58÷(2/5-15%)÷0.4 简便计算 求求了
人气:496 ℃ 时间:2020-02-10 03:43:45
解答
58÷(2/5-15%)÷0.4
=58÷(0.4-0.15)÷0.4
=58÷(0.25x0.4)
=58÷0.1
=580
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