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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:486 ℃ 时间:2020-06-17 18:22:28
解答
8100/(27/7)
=8100÷27×7
=300×7
=2100
357-183-317-357
=357-357-(183+317)
=0-500
=-500
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