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Standards/Math/Northern Mariana Islands/2.NBT.B.9

2.NBT.B.9

2.NBT.B Use place value understanding and properties of operations to add and subtract.
2.NBT.B.5
2.NBT.B.6
2.NBT.B.7
2.NBT.B.8
2.NBT.B.9

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

Khan Academy Resources
Subtract within 1,000 using place value blocksSubtract on a number lineSubtracting with place value blocks (regrouping)
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