简便计算:28\58×14\5+38\5×7.2
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![简便计算:28\58×14\5+38\5×7.2](/uploads/image/z/52808-32-8.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A28%5C58%C3%9714%5C5%EF%BC%8B38%5C5%C3%977.2)
简便计算:28\58×14\5+38\5×7.2
简便计算:28\58×14\5+38\5×7.2
简便计算:28\58×14\5+38\5×7.2
28\58×14\5+28\5×7.2
=2/28*(29+2+5*3.6)
=1/14*(29+2+18)
=1/14*49
=7/2
28\58×14\5+28\5×7.2
=2/28*(29+2+5*3.6)
=1/14*(29+2+18)
=1/14*49