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314×0.043+3.14×7.2×7.2 简便运算
人气:173 ℃ 时间:2020-03-29 14:05:45
解答
=314*0.043+314*7.2*7.2*0.01
=314*(0.043+0.5184)
=314*0.5614
=176.2796
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