# JoAnn's School

Saturday, October 12th, 2019. This tree grew for 50 years, it was cut down and removed in less than an hour. This was the 3rd tree to be cut down within two years in a row of five houses. Watch as the tree service skillfully removes the branches and avoids hitting the home and the cars parked around it. Sad to see the tree go. Sorry it's so shaky.

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We can use multiples to estimate quotients. A multiple is a product of a number and a counting number. A quotient is the number that we get using division, but it does not include any leftover amount (which is called a remainder) We can make a list of multiples to help us find a quotient for a division problem. Multiplication and division are opposite operations that undo each other, they're inverse operations. We can use multiples and multiplication facts to help us divide. When estimating a quotient, we can tell which two numbers the quotient is between by finding two multiples of the divisor that the dividend is between. We solve three word problems involving multiples. We estimate to find quotients for three division equations. We use a less than or greater than symbol to decide whether the actual quotient is less than or greater than the estimate that is given. We discuss how we can multiply by multiples of 100 if a dividend is 4 digits.

4th Grade Math 2.3, Multiply Tens, Hundreds, Thousands

https://youtu.be/XgO6j6SGVn8

4th Grade Math 3.2, Estimate Products of Factors with 2-digits

https://youtu.be/DpPRH8lvDsI

4th Grade Math Playlist (2015)

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

FOLLOW ME:

TWITTER https://twitter.com/JoannsSchool

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PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use the strategy "draw a diagram" to solve multi-step multiplication problems. We can draw a bar model that fits the operation we need to use to compare two numbers to each other. We can then use the bar model to write an equation to find how many more one amount is than the other. We review the steps to solving word problems. We show and solve 5 word problems involving multiplication with multiplying twice, multiplying with subtraction, or multiplication with addition. We discuss the clue words that we saw in our word problems that would help us choose which operation to use.

4th Grade Math 3.4, Multiply 2-digit Factors Using Partial Products

https://youtu.be/qhmNj6j6778

4th Grade Math 3.5, Multiply 2-digit Factors with Regrouping

https://youtu.be/GUEIht1XrtY

4th Grade Math 3.6, Choose a Method for 2-digit Multiplication, Partial Products or Regrouping

https://youtu.be/3WobkS3uHYM

4th Grade Math Playlist (2015)

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

FOLLOW ME:

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

SUPPORT MY WORK:

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

Oct 9, 2019. Whenever I pack the dry dog food into smaller Ziplock bags to keep them fresh, Bonnie likes to search for whatever might be remaining inside the big bag. It's like licking the bowl when someone bakes a cake.

TWITTER https://twitter.com/JoannsSchool

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YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can solve and record the product of 2-digit factors by using either partial products or regrouping. We do a quick review of multiplying with partial products, and a quick review of multiplying with regrouping. But, it's best if you have seen video 3.4 and video 3.5 to learn about multiplying with partial products and multiplying with regrouping. We discuss the benefits of using partial products compared to the benefits of using regrouping. We begin with the ones place when using regrouping because we might have a regrouped number that will need to be added to the tens place. We use Mental Math to identify relationships to find a missing number. We solve three word problems that involve 2-digit multiplication.

4th Grade Math 3.4, Multiply 2-digit Factors Using Partial Products

https://youtu.be/qhmNj6j6778

4th Grade Math 3.5, Multiply 2-digit Factors with Regrouping

https://youtu.be/GUEIht1XrtY

4th Grade Math 4.7, Divide Using Repeated Subtraction

https://youtu.be/zJNYb5hb5QE

4th Grade Math Playlist (2015)

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use regrouping to multiply a 1-digit factor by a factor with many digits. We start on the right side with the ones place, then the tens, then the hundreds, then thousands. We regroup when the product in any place is 10 or more. We write the regrouped number in the column above the next greater place. We then multiply to that column, and add the regrouped amount to that partial product. Turning a sheet of lined paper sideways will help us keep our place value straight. Before we multiply, we can estimate the product to know what a reasonable product should be. If we round our factor to the next digit to the left, our estimate will be more accurate. We can tell how many digits will be in the product from an estimate. We solve a multi-step word problem involving a table of information. We solve and compare to find less than, greater than, or equal to. We solve a word problem involving 4-digit numbers multiplied to a 1-digit number with subtraction. We find what number is a given amount more than the product of two given factors.

4th Grade Math 2.4, Estimate Products by Rounding

https://youtu.be/RiqkePNBAqo

4th Grade Math 2.10, Multiply 2-digit Numbers by 1-digit Numbers with Regrouping

https://youtu.be/6c8cpUqGcDY

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use area models and partial products to multiply 2-digit factors. We draw an area model to find the partial products and then add the partial products to find the final answer. We review the Distributive Property. We show and solve several problems involving area models and partial products. It doesn't matter how we break up factors, because their partial products will always equal the same sum. We discuss the importance of using parentheses when writing our factors and partial products. It's easier to break apart factors into multiples of 10 because we can quickly multiply basic facts and add the amount of zeros in the factors to the partial products. Modeling partial products can help us find the products of greater numbers by helping us do mental math. When we multiply a 2-digit factor by a 1-digit factor, we will have TWO partial products. When we multiply a 2-digit factor by a 2-digit factor, we will have FOUR partial products.

4th Grade Math 2.7, Multiply Using Partial Products

https://youtu.be/BnHqL31B3GA

4th Grade Math 2.10, Multiply 2-digit Numbers by 1-digit Numbers with Regrouping

https://youtu.be/6c8cpUqGcDY

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use strategies to estimate products. We can round each factor to the greatest place value, which is the place value farthest to the left. We can also use compatible numbers. We review the rounding rules to round to a certain place value. Compatible numbers are friendly numbers, they're easy to compute mentally. We solve several word problems involving estimating products. We see the difference of rounding to the nearest 10, compared to using compatible numbers. We give some examples of why it's better for us to estimate in some situations than find exact answers. If the rounded factors are greater than the actual factors, the estimate will be greater than the exact answer and we will overestimate. If the rounded factors are less than the actual factors, the estimate will be less than the exact answer and we will underestimate. If one rounded factor is greater, and another rounded factor is less than the actual factors, the estimate will be close to the exact answer. We find two possible factors for a given estimated product.

4th Grade Math 2.3, Multiply Tens, Hundreds, Thousands

https://youtu.be/XgO6j6SGVn8

4th Grade Math 2.8, Multiply Using Mental Math & Properties

https://youtu.be/6pC8Kghhw94

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use several strategies to multiply by tens. We can use place value, a number line, Mental Math, the Associative Property of Multiplication, and the Commutative Property of Multiplication. We review the Associative and the Commutative Properties of Multiplication. We show how the Associative and Commutative Properties can be used together. We show examples of how to multiply tens by using place value. We use mental math, to multiply basic facts with the number of zeros in the factors as the number of zeros that will be in the product. We also show how to use mental math by using "halving and doubling". We use a number line to multiply 2-digit numbers. The factors in the equation will help us decide which strategy to use. We solve two word problems involving multiplication with 2-digit factors. We find the answer to the riddle, "The product of my number and twice my number is 288. What is half my number?", by using a table and the strategy Guess and Check.

4th Grade Math 2.3, Multiply Tens, Hundreds, Thousands

https://youtu.be/XgO6j6SGVn8

4th Grade Math 2.8, Multiply Using Mental Math & Properties

https://youtu.be/6pC8Kghhw94

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

I've made a comparison table of the math that was taught in the 1980s compared to now, chapter by chapter. The math level difference is amazing. The USA was 45th worldwide in math several years ago, now we're 39th. Raising the levels has helped. Let me know what you think in the comments. I'm curious what the math levels are like in other countries compared to the USA. Here is a link to a map showing math levels by many countries: http://factsmaps.com/pisa-worldwide-ranking-average-score-of-math-science-reading/

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We can represent a multi-step word problem by writing an equation. Then we can solve the equation. We can make models, using the given information, then use the models to write and solve equations to solve each problem. We can solve a multi-step problem but using several one-step equations. We can also use the Order of Operations to write only one equation that has a combination of operations. The Order of Operations states we do parentheses first, we multiply or divide from left to right, then we add or subtract from left to right. We see the difference between two statements and their equations that are represented when using, or not using, the Order of Operations. When a step is missing from the Order of Operations, we move to the next step. We show and solve several examples of using the Order of Operations.

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

4th Grade Math 2.5, Multiply Using the Distributive Property

https://youtu.be/-BV3HXcRRYI

4th Grade Math 2.6, Multiply Using Expanded Form

https://youtu.be/rd7TfQrJLT4

4th Grade Math 2.7, Multiply Using Partial Products

https://youtu.be/BnHqL31B3GA

4th Grade Math 2.8, Multiply Using Mental Math & Properties

https://youtu.be/6pC8Kghhw94

4th Grade Math 2.9, Word Problems, Multi-step Multiplication Problems

https://youtu.be/rXVai8N7Bx0

4th Grade Math 2.10, Multiply 2-digit Numbers by 1-digit Numbers with Regrouping

https://youtu.be/6c8cpUqGcDY

4th Grade Math 2.11, Multiply 3 or 4-digit Numbers by 1-digit with Regrouping

https://youtu.be/KcmUvIcnJZY

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

SUPPORT MY WORK:

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/J..

We have learned to multiply 2-digit factors by 1-digit factors by adding partial products. We can also multiply these factors by using regrouping. We begin by multiplying to the lowest place value, the ones, then move left to the next greater place value. We regroup when necessary. We can estimate before we multiply to know what a reasonable answer should be. We use Base 10 blocks to model multiplying 2-digit numbers by 1-digit numbers with regrouping. We compare multiplying with partial products versus multiplying with regrouping. We identify a relationship to write a rule to fit a table to find unknown numbers. We show several examples of word problems that involve multiplying 2-digit numbers by 1-digit numbers with addition, or with subtraction. We find two factors whose product is equal to their sum.

4th Grade Math 2.7, Multiply Using Partial Products

https://youtu.be/BnHqL31B3GA

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use the strategy Draw a Diagram to help us solve a multi-step multiplication problem. A diagram will help us organize and visualize the information that is given. We can also use counters, make a list, or use properties to help us solve word problems. We review the steps to solving word problems. We use what we know about arrays and multiplication to help us. We solve six word problem examples. We show multiplication with subtraction, multiplication with addition, using a given quantity to find two other quantities, using the strategy Make a List, and using Halving and Doubling or the Distributive Property to solve a word problem.

4th Grade Math 2.5, Multiply Using the Distributive Property

https://youtu.be/-BV3HXcRRYI

4th Grade Math 2.8, Multiply Using Mental Math & Properties

https://youtu.be/6pC8Kghhw94

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use Mental Math and properties to help us multiply. By using Properties of Multiplication, we can multiply friendly numbers first, or break numbers apart to be friendlier. Friendly numbers are numbers that are easy to add, subtract, multiply, or divide using mental math. We review the Commutative and Associative Properties of Multiplication, and the Distributive Property. We show examples of using the strategy Halving and Doubling to multiply large numbers. We show examples of using the Distributive Property with addition or subtraction, and how they're related because, either way, we are breaking apart a factor. We solve a word problem using the Distributive Property, which involves a table of information, with addition and subtraction to show that we will get the same answer.

4th Grade Math 2.1, Multiplication Comparisons

https://youtu.be/2d4qPe7NvHQ

4th Grade Math 2.5, Multiply Using the Distributive Property

https://youtu.be/-BV3HXcRRYI

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use place value and partial products to multiply by a 1-digit factor. We break apart the greater factor into thousands, hundreds, tens, and ones. Next, we can multiply each of these place values by the 1-digit factor. Then we add the partial products to get the full product. When we use Mental Math to multiply by place value and partial products, we begin on the left of the model for the greatest place value. We can use what we know about the Distributive Property to break apart greater factors to find products of 3-digit and 1-digit factors. We use place value and partial products. We show four word problems as examples using multiplication an addition, or multiplication and subtraction, and using the strategy Guess and Check to solve one of them.

4th Grade Math 2.4, Estimate Products by Rounding

https://youtu.be/RiqkePNBAqo

4th Grade Math 2.5, Multiply Using the Distributive Property

https://youtu.be/-BV3HXcRRYI

4th Grade Math 2.6, Multiply Using Expanded Form

https://youtu.be/rd7TfQrJLT4

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

Expanded form is a way to write numbers by showing the value of each digit. We can use expanded form to multiply a multi-digit number by a 1-digit number. We can write the greater factor in expanded form, then we can use the Distributive Property to multiply each addend by the 1-digit number and add the partial products.. The amount of place values in our expanded form will be the amount of addends we have as partial products. We show how to model the Distributive Property using a rectangle divided into sections. We solve four word problems showing how to use expanded form and the Distributive Property, one involves a table of information that we use to solve the problem.

4th Grade Math 1.2, Read and Write Numbers in Standard Form, Word Form, Expanded Form

https://youtu.be/ldtaIWc1UCk

4th Grade Math 2.4, Estimate Products by Rounding

https://youtu.be/0hoVxkyTPXo

4th Grade Math 2.5, Multiply Using the Distributive Property

https://youtu.be/-BV3HXcRRYI

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

The Distributive Property states that multiplying a sum by a number is the same as multiplying each addend by that number, and then adding the products. We can use the Distributive Property to multiply a 2-digit number by a 1-digit number. We can break apart the greater number as a sum of two lesser numbers. Next, we multiply each of the two lesser numbers by the 1-digit factor. Then we can add those partial products to find the total product. We'll get the same answer no matter how we break apart the 2-digit number. We multiply a 1-digit number by a 2-digit number by using grid paper. We multiply 1-digit number by a 2-digit number by using base ten blocks. We see how we can use mental math to solve multiplication problems that involve a 1-digit and 2-digit number. We write a word problem that fits a picture, write an equation, then solve. We see why it's helpful to use parentheses when writing or solving an equation with more than one operation.

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can estimate products by rounding the greater factor to the nearest higher place, then multiply using mental math. We can also estimate by finding two numbers that the exact answer should be between. By using the maximum and minimum numbers to round to the next higher and the next lower number, our estimate will represent a range of possible numbers. We can estimate a product to find if an answer is reasonable and makes sense. We can use the Associative Property to help us multiply and estimate. We review multiplying tens, hundreds, and thousands, and putting the number of zeros in the factors as the number of zeros in the product, that we learned in lesson 2.3. We remove unnecessary information from a given word problem. We predict whether an exact answer will be less than or greater than an estimate.

4th Grade Math 2.3, Multiply Tens, Hundreds, Thousands

https://youtu.be/XgO6j6SGVn8

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

By understanding place value, we can multiply tens, hundreds, and thousands. The number of zeros in the factors tells us how many zeros to put in the product. We can also use quick drawings to help us by drawing little boxes for each hundred, then counting how many hundreds we made. We can use a number line to multiply tens, hundreds, thousands, or larger place values. We can think of multiplication as repeated addition. We can use patterns of basic facts and zeros showing each product will be 10 times more than the previous amount. We use reasoning to find a missing factor. An inverse operation is an opposite operation. Multiplication and division are inverse operations because they undo each other. We find the basic fact as division to solve for the missing factor. We solve a multi-step word problem involving multiplication and addition. We review the Order of Operations as parentheses first, multiply or divide from left to right, then add or subtract from left to right.

3rd Grade Math 7.11, Order of Operations, Multiply or Divide then Add or Subtract

https://youtu.be/y8fGoZjb67c

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

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A model can help us solve a comparison problem by helping us visualize the amounts that are being compared. A model will help us decide if we need to multiply or subtract to solve. There are clue words in word problems that will help us decide which operation to use. If we need to find how many more or how many less, we'll need to use subtraction to compare quantities. If we need to find how many times as much, we'll need to use multiplication to compare quantities. We show four examples of word problems comparing quantities. We solve a word problem involving direction. We solve another word problem involving perimeter.

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

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YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can model multiplication comparisons by using a bar model to represent the two quantities. We can also use a quick drawing of little circles or tally marks to represent the two quantities. A variable is a letter of the alphabet that takes the place of an unknown amount. We can use variables to write an equation. An additive comparison uses addition and a multiplicative comparison uses multiplication. We show several examples of using bar models to help us solve problems. We write an equation for a given comparison statement, and we write a comparison statement for a given equation. We can make our bar models in any order because the Commutative Property states that we can multiply two factors in any order and get the same product.

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can use the strategy draw a diagram, to solve comparison word problems, that involve addition or subtraction. A comparison problem compares one amount to another amount. Our diagram can be a bar model. A bar model helps us see how information is related. We are comparing two quantities. In a bar model, the two boxes represent the quantities being compared. The bracket represents the difference. We can check our answer by using estimates to see if our answer is reasonable. We can also check our answer by using an inverse operation. We show three examples of solving word problems using bar models for comparison, and a multi-step word problem involving a table of information.

4th Grade Math 1.4, Round Numbers to a Certain Place-value

https://youtu.be/DaiMFwbArZE

4th Grade Math 1.5, Rename Numbers, Combine Place Values

https://youtu.be/19X12LcRits

4th Grade Math 1.6, Add Whole Numbers with Regrouping, Renaming

https://youtu.be/BdNVPPSRNeE

4th Grade Math 1.7, Subtract Whole Numbers with Regrouping, Renaming

https://youtu.be/xWN5YCt9cNc

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can subtract whole numbers by lining up the digits by place value, then subtracting from right to left. We first subtract the Ones, then the Tens, then the Hundreds, etc. We regroup when the digit in the minuend is less than the digit in the subtrahend. We can turn our paper sideways to help us write each digit in the correct place value. We can also use grid paper or a place value chart. We solve word problems using subtraction with regrouping. We subtract to find a difference, then use addition to check our answer. Inverse operations undo each other. Addition and subtraction are inverse operations. We see how we can combine place values to subtract when there is a zero in the minuend. Many students make math errors because they don't write their numbers clearly, or they forget to correctly lineup their place values.

4th Grade Math 1.5, Rename Numbers, Combine Place Values

https://youtu.be/19X12LcRits

4th Grade Math 1.6, Add Whole Numbers with Regrouping, Renaming

https://youtu.be/BdNVPPSRNeE

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

We can add whole numbers by aligning the digits by place value, then adding from right to left. We first add the Ones, then the Tens, then the Hundreds, Etc. We regroup when necessary. We can turn our school paper sideways to line up our place values using the lines on the paper. We must add or subtract the correct digits that are in the correct place values. When adding a column (place value) and the sum is 10 or greater, we regroup the left digit to the next greatest place value. We can only write one digit for each place value sum. We show an example of solving a word problem using a place value chart to add numbers in the hundred thousands. We can estimate to tell whether an answer is reasonable. To estimate a sum, we round each addend first. We add two addends together and then estimate the addends to see if our estimate is close to our actual sum. We do abstract reasoning and find the missing number and name the property we used to find it. We solve a word problem using a table of information to add three digits, then estimate the sum to see if our answer is reasonable. We add compatible numbers first. We solve a multi-step word problem involving addition with regrouping.

4th Grade Math 1.4, Round Numbers to a Certain Place-value

https://youtu.be/DaiMFwbArZE

4th Grade Math 1.5, Rename Numbers, Combine Place Values

https://youtu.be/19X12LcRits

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

SUPPORT MY WORK:

PATREON https://www.patreon.com/JoannsSchool

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YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6..

By renaming numbers and combining place values, we will understand the upcoming lessons of multiplying with regrouping. We can rename a whole number by drawing a quick picture of Base 10 blocks, or by using a place-value chart to help us. We can draw squares that represent the different amounts of each Base 10 block. One large cube is equal to 1000 units. 1 flat is equal to 100 units. One long is equal to 10 units. We show several examples of renaming thousands, hundreds, or tens. We show a few word problems involving renaming numbers and using a place-value chart to help us answer the questions.

https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn

I'm using the Houghton Mifflin Go Math!

2015 copyright textbook for this playlist.

You can practice online using the textbook's website

https://www.gomathacademy.com/

TWITTER https://twitter.com/JoannsSchool

FACEBOOK https://www.facebook.com/JoAnnsSchool/

MINDS https://www.Minds.com/joannsschool

PATREON https://www.patreon.com/JoannsSchool

PAYPAL https://www.paypal.me/JoAnnsSchool

YOUTUBE FAN FUNDING on my channel Home page

https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw

Education for everyone!

I have over 2,600 Math videos on YouTube, ranging from 1st grade through Algebra 2 and high school Geometry. Many don't auto-upload from YouTube, I'm sorry! It would be impossible for me to upload all of them onto BitChute.

I've included most of my GED Math videos and the Grade 1.

I'm planning to do Trigonometry, then a Pre-Calculus Playlist in the future.

You can study an entire grade level of Math, lesson by lesson with my playlists, in order. You can find the textbooks online.

Catch up to your class, work ahead, pass the GED, or place higher on college entry tests to avoid remedial classes.

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