2.OA.B.2
MATH.CONTENT-Operations & Algebraic Thinking-Grade 2
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
MATH.CONTENT-Operations & Algebraic Thinking-Grade 2
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.