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37.8×0.075+0.378+0.25×3.78简便运算
人气:125 ℃ 时间:2020-05-14 12:17:30
解答
37.8×0.075+0.378+0.25×3.78
=0.378*7.5+0.378+2.5*0.378
=(2.5+7.5)*0.378+0.378
=3.78+0.378
=4.158
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