19.375减(5又7分之4减8分之5)减2又7分之3,

问题描述:

19.375减(5又7分之4减8分之5)减2又7分之3,

19.375减(5又7分之4减8分之5)减2又7分之3
=(19-5-2)+(3/8-4/7+5/8-3/7)
=12+0
=12