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简便计算 99乘50分之21
人气:138 ℃ 时间:2020-01-30 05:07:02
解答
99 * (21/50)
= (100-1) * (21/50)
= (100 * 21)/50 - 21/50
= 42 - 21/50
= 42 - 0.42
= 41.58
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