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December 20, 2014

December 20, 2014

Posted by **javon** on Monday, November 8, 2010 at 8:41pm.

- 3rd grade -
**Ms. Sue**, Monday, November 8, 2010 at 8:49pmIt's easy to add two numbers in your head. But it's much harder to add four numbers in your head.

- 3rd grade -
**jordy**, Thursday, November 18, 2010 at 5:25pm349-214=ballpark estimate:

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