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Grade 1

Grade 1

Operations & Algebraic Thinking 1.OA.B.4

The Standard

4. Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.

Aligned Resources

More standards from Grade 1 - Operations & Algebraic Thinking

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