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2.61乘39.5+0.318乘261+2.87乘26.1怎么简算
人气:418 ℃ 时间:2020-04-25 02:31:56
解答
2.61*39.5+0.318*261+2.87*26.1 =2.61*39.5+31.8*2.61+28.7*2.61 =2.61*(39.5+31.8+28.7) =2.61*100 =261
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