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0.79*0.46 7.9*0.24 11.4*0.079用简便的方法怎么做
人气:111 ℃ 时间:2019-09-17 04:10:03
解答
0.79*0.46+7.9*0.24+11.4*0.079
=0.79*0.46+0.79*2.4+1.14*0.79
=0.79*(0.46+2.4+1.14)
=0.79*3
=2.37
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