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49.8×2.73+2.73×50.1+0.273 简算
人气:235 ℃ 时间:2020-04-24 04:14:47
解答
49.8×2.73+2.73×50.1+0.273
=2.73×(49.8+50.1+0.1)
=2.73×100
=273
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