CCSS.Math.Content.2.OA.B.2 2nd Grade
CCSS.Math.Content.2.OA.B.2 2nd Grade
Add and subtract within 20. Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Exercises
Fluently add and subtract within 20 using mental strategies. CCSS.Math.Content.2.OA.B.2
CCSS.Math.Content.2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
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