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Number and Operation in Base Ten (2.NBT)
Number and Operation in Base Ten (2.NBT)
B. Use place value understanding and properties of operations to add and subtract
8. Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
We are learning to use mental math to add and subtract.
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Worksheets
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Games
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