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5.6×12.5和0.58×9＋0.58这两题怎么简便计算啊!
人气：492 ℃　时间：2019-08-22 15:11:46
解答
5.6x12.5
=0.7x8x12.5
=0.7x100
=70
0.58x9+0.58
=0.58x(9+1)
=0.58x10
=5.8
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