Grade 2Addition & Subtraction

2.NBT.B.9

Say why a strategy works, not just that it gives the right answer.

Worksheets for this standard 1 topic

Explain Addition and Subtraction Strategies3 ways

The standard, officially

Explain why addition and subtraction strategies work, using place value and the properties of operations.* *Explanations may be supported by drawings or objects.

Builds on

1.OA.B.3Add in any order or grouping 1.OA.B.4Subtract by finding the missing addend 2.NBT.B.5Add and subtract within 100 2.NBT.B.7Add and subtract within 1000

Leads to

—