8.88*1.25+2.5*4.44的简便运算
人气:123 ℃ 时间:2020-01-30 18:36:49
解答
原式=8*1.11*1.25+4*1.11*2.5
=22.2
把8.88 4.44拆成共有的因数1.11*8 和1.11*4
然后使用分配律就会发现可以相乘得整数
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