2.nbt.9 Worksheets

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Previous Standard Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
Next Standard Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
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.