CCSS.Math.Content.2.NBT.B.9

Explain why addition and subtraction strategies work, using place value and the properties of operations.

Recent CCSS.Math.Content.2.NBT.B.9 Lesson Plans & Resources
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Subtraction Collection

Activity | Grades K-2

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Addition Collection

Activity | PreK, Grades K-2

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Addition and Subtraction: Word Problems

Lesson Plan | Grades K-2

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