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5.1乘3.6加2.1乘3.6加7.2乘6.4简便计算
人气:440 ℃ 时间:2020-06-18 04:12:05
解答
5.1乘3.6加2.1乘3.6加7.2乘6.4
=3.6x(5.1+2.1)+7.2x6.4
=3.6x7.2+6.4x7.2
=7.2x10
=72
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