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题型：单选题 题类：常考题 难易度：容易
9的乘法口诀1894 10
3 × 4 + 3 = 2 × 8 – 2 = 2×5 + 2 = 3 × 8 – 3 =
6 × 3 – 6 = 5 × 4 – 5 = 7 ×2 + 2 = 5 × 4 – 5 =
4×3= 66－45= 70－5= 23－（46－38）=
36+7= 25+65= 23+37= 21+19+34=
5×6= 90－45= 2×2= 6×6-28=
42-8= 6×4= 4×4= 40+（89-54）=
25+21= 5×3= 6×3= 70+2×6=
综合算式：
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