6.12乘99加6.12和5.9乘101减5.9怎么简便计算
人气:235 ℃ 时间:2019-11-02 10:37:43
解答
6.12乘99加6.12
=6.12*(99+1)
=6.12*100
=612
5.9乘101减5.9
=5.9*(101-1)
=5.9*100
=590
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