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Previous Standard
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

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

Worksheets

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

Add ten or one hundred to the number shown.

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