Common Core StandardsAñadir y restar dentro de 20 |
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|---|---|
| Grade: | 2nd Grade |
| Standard: | Math.2.OA.2 or 2.OA.B.2 |
| Description: | Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers. |
