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数学
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6除0.25除0.4 3.6除【0.25乘{17.3加30.7}】简便计算
人气:298 ℃ 时间:2019-12-09 04:22:13
解答
第一式是除以,不是除吧.如果是除,方法类似.
6÷0.25÷0.4 = 6÷1/4÷2/5 = 6*4*5/2 = 60
0.25*(17.3+30.7) = 1/4*48 = 12
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