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简算:86×0.27+8.2×1.4+5.5×8.6,
人气:494 ℃ 时间:2019-12-17 04:33:58
解答
=8.6×0.27+8.2×1.4+5.5×8.6
=8.6×(2.7+5.5)+8.2×1.4
=8.6×8.2+8.2×1.4
=8.2×(8.6+1.4)
=8.2×10
=82
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