5.2÷[7.5÷(16-4.5)]
展开全部
这个先计算括号里面的
解:5.2÷[7.5÷(16-4.5)]
=5.2÷[7.5÷11.5]
=5.2x11.5/7.5
=4x13x5x23/(5x3x5x10)
=2x13x23/(3x5x5)
=598/75
=7+73/75
解:5.2÷[7.5÷(16-4.5)]
=5.2÷[7.5÷11.5]
=5.2x11.5/7.5
=4x13x5x23/(5x3x5x10)
=2x13x23/(3x5x5)
=598/75
=7+73/75
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