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12.5×5.7×8-5.7÷0.1简算
人气:290 ℃ 时间:2020-03-25 15:52:05
解答
12.5×5.7×8-5.7÷0.1
=12.5×8×5.7-5.7×10
=100×5.7-57
=5700-57
=5643
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