![[K.OA.1-1.2] Basic Addition/ Subtraction - Common Core Standard](https://i.ytimg.com/vi/2mTA1XoQqIU/mqdefault.jpg)
![[K.OA.1-2.0] Basic Addition/ Subtraction - Common Core Standard](https://i.ytimg.com/vi/LGXgHhI1nZA/mqdefault.jpg)
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Last Updated: September 18, 2026
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