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1.25*5.6+2.25*3.6的简便运算的步骤
人气:294 ℃ 时间:2020-03-19 03:46:46
解答
1.25*5.6+2.25*3.6
=1.25*0.8*7 + 2.25*4*0.9
=7+9*0.9
15.1
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