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0.87乘以7.13加8.7乘以0.187加0.87怎么用简便方法算?
人气:464 ℃ 时间:2020-01-29 22:28:16
解答
0.87乘以7.13加8.7乘以0.187加0.87
=0.87*7.13+0.87+1.87+0.87
=0.87*(7.13+1.87+1)
=0.87*10
=8.7
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