Illuminations: Fact Families

In this lesson, the relationship of addition to subtraction is explored with books and with connecting cubes.

Students search for related addition and subtraction facts for a given number using a virtual or actual calculator to find differences. They also investigate fact families when one addend is 0 as well as when the addends are the same.

 

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Addition & Subtraction
K-6, Educator

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Illuminations (National Council of Teachers of Mathematics)

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