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5.4×0.68+0.34×2×0.46简便计算
人气:300 ℃ 时间:2019-12-13 10:03:56
解答
5.4×0.68+0.34×2×0.46
=5.4×0.68+0.68×0.46
=0.68×(5.4+0.46)
=0.68×5.86
=3.9848
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