7.77*5.8+19*0.777+77.7*023简便计算,
人气:331 ℃ 时间:2020-05-08 06:37:37
解答
7.77*5.8+19*0.777+77.7*0.23
=777*(0.01*5.8+19*0.001+0.1*0.23)
=777*(0.058+0.019+0.023)
=777*0.1
=77.7
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