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More on Common Core Standards

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High School: Number and Quantity
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Grade 2

Grade 2

Number & Operations in Base Ten 2.NBT.B.9

The Standard

9. Explain why addition and subtraction strategies work, using place value and the properties of operations.¹

Aligned Resources

More standards from Grade 2 - Number & Operations in Base Ten

If I'd had to teach to the Common Core, I would have used Shmoop, too.

Aristotle

The observed gravitational effect between Common Core activities results from their warping of Shmooptime.

Albert Einstein