2nd Grade Math 3.9, Use Equations to Represent Problems

Addition and subtraction number sentences are called equations. Equations have an equal sign. They show the parts and whole of a problem. An equation can be used to show a problem. In this lesson we use a box as a missing addend to prepare the student to use variables to take the place of an unknown amount. We solve 6 word problems that involve finding a sum or difference.

2nd Grade Math playlist:
https://www.youtube.com/playlist?list=PLKi4WTp6PRGUL-MlUdbT5DeAsigMuQc4o

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/

This video and its contents are the property of JoAnn's School and
is protected under U.S. copyright law.

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