Task 226 | Grade 1 icon

Fact Families

Illustrative MathematicsVaries

The purpose of this task is for students to identify and write sets of related addition and subtraction equations; these are often known as 'fact families' because the equations are related by the same underlying relationship between the numbers. This task reinforces the commutative property of addition and using the relationship between addition and subtraction. It is best given after the students have had quite a bit of experience adding and subtracting within 10.

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