CCSS 2.NBT.9 Worksheets

CCSS 2.NBT.9 (Common Core, 2nd Grade): "Explain why addition and subtraction strategies work, using place value and the properties of operations." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.

2nbt8

Number and Operations in Base Ten Use place value understanding and properties of operations to add and subtract. 9Explain why addition and subtraction strategies work, using place value and the properties of operations.

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Addition Strategies

2nbt9

• Use compensation (adding a little extra, then subtracting it back) to make friendly numbers.
• Solve addition problems by using doubles and near-doubles when numbers are close.