Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
| Screenshot | Name / Description | Flag? | Rating |
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| Skater Math Get the addition and subtraction problems correct to jump obstacles. |
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| Subtraction Blast Point with your mouse and blast multiples of 2 and 3. |
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| Fraction Tilt Add and subtract to equalize the seesaw |
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| Poddles Game Add weights to the scale to arrive at the Poddle's weight |
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