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数学
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45乘12乘58减12乘3怎么做最简便
人气:439 ℃ 时间:2019-10-17 08:18:12
解答
45X12X58-12X3
=12(45X58-3)
=12(45X50+45X8-3)
=12(2250+360-3)
=12X2607
=2607X10+2607X2
=26070+5214
=31284
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