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8100/(27/7) 357-183-317-357 简便计算
8100/(27/7) 357-183-317-357 简便计算
人气:433 ℃ 时间:2020-05-13 22:07:56
解答
8100/(27/7)
=81*100*7/27
=700*3*27/27
=2100
357-183-317-357
=357-357-(183+317)
=-(183+317)
=-500
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