75+360/(20-5)简便计算 ,65+320/(20-15)简便计算

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75+360/(20-5)简便计算,65+320/(20-15)简便计算75+360/(20-5)简便计算,65+320/(20-15)简便计算75+360/(20-5)简便计算,65+320/(20

75+360/(20-5)简便计算 ,65+320/(20-15)简便计算
75+360/(20-5)简便计算 ,65+320/(20-15)简便计算

75+360/(20-5)简便计算 ,65+320/(20-15)简便计算
75+360/20-360/5=75+18-72=21;