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2nbt7

Number and Operations in Base Ten Use place value understanding and properties of operations to add and subtract. 8Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

2nbt9

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2nbt8

- adding-subtracting-10s-and-100s worksheet

Adding-Subtracting 10s and 100s

2nbt8

Each worksheet has 100 problems finding 10 more, 10 less, 100 more and 100 less than a number between 100 and 900.

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