| Whole Numbers Subtraction: 0 to 9 | |||||||||
![]() Common Core Math Alignment: 2.OA.2. Fluently add and subtract within 20 using mental strategies.
![]() This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. |
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| 50% (375 x 200) |
| 75% (563 x 300) |
| 100% (750 x 400) |
| 150% (1125 x 600) |
| 200% (1500 x 800) |
| 300% (2250 x 1200) |



