We can add fractions with like denominators by using properties of addition and mental math.
Commutative Property of Addition: When the order of two addends is changed, the sum is the same. We can add in any order.
Associative Property of Addition: …
We can add fractions with like denominators by using properties of addition and mental math.
Commutative Property of Addition: When the order of two addends is changed, the sum is the same. We can add in any order.
Associative Property of Addition: When the grouping of the addends is changed, the sum is the same. We can move the parentheses to two different addends.
The properties of addition help us to use Mental Math by adding compatible addends first, that equal one whole.
When the numerator and denominator are the same number, the fraction is equal to one whole.
We can use properties of addition to help us add fractions if one of the addends has a different denominator. We add the compatible fractions first, that are equal to 1, then add the fraction with the different denominator.
We can also use BOTH the Commutative and Associative Properties of Addition to add in one equation.
We identify which property of addition was used in a problem.
We solve 3 word problems involving fractions and properties of addition.
4th Grade Math 2.12, Solve Multi-step Word Problems Using Equations
https://youtu.be/lwdLI0DJeJs
4th Grade Math 6.3, Fractions in Simplest Form, a.k.a. Reducing
https://youtu.be/pccNZ9CKm4g
4th Grade Math 7.7, Add & Subtract Mixed Numbers with Like Denominators
https://youtu.be/zsjiPOeKfeA
4th Grade Math Playlist
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/
YouTube rating for JoAnn's School videos:
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N0 - No nudity
S0 - No sexual situations
V0 - Not violent or disturbing
D0 - No drug reference or content
F0 - No flashing lights content
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