5th Grade Math 1.3, Properties of Addition and Multiplication, Mental Math
We discuss the Commutative Property of Addition and of Multiplication, the Associative Property of Addition and of Multiplication, the Identity Property of Addition and of Multiplication, and the Distributive Property. To add two or more addends using mental math, we can use the Commutative and Associative Properties of Addition. We show the difference of multiplying three factors without using the properties compared to using the Commutative and Associative Properties of Multiplication, to quickly perform mental math. We show how the Distributive Property can be used with multiplication and addition, and with multiplication and subtraction. We can apply the Distributive Property in reverse by pulling out a common factor. We talk about why we cannot use the Commutative Property with division or with subtraction. We match given equations to the correct property that was used.
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5th Grade Math Playlist
• 5th Grade Math Course
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/
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