口算。34 +17 = 51 – 19 = 28 + 27 – 25= 100 – 48 + 37 = 6 + 6 + 6 =6 × 3 = 4× 4= 3 ×3 = 5×2 = 2×4 =

题型：口算与估算题类：常考题难易度：容易

西师大版小学数学二年级上学期第一单元第1课时《乘法的初步认识》

口算。

34 +17 = 51 – 19 = 28 + 27 – 25= 100 – 48 + 37 = 6 + 6 + 6 =

6 × 3 = 4× 4= 3 ×3 = 5×2 = 2×4 =

举一反三

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