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3.82×0.69+3.82×0.21+0.382简便计算
人气:230 ℃ 时间:2020-01-31 13:36:14
解答
=3.82(0.69+0.21)+0.382
=3.82*0.9+0.382
=3.82*0.9+3.82*0.1
=3.82*(0.9+0.1)
=3.82
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