[(29/5+1/2)-(3/5+12/5 / 2/3)]/7/10

问题描述:

[(29/5+1/2)-(3/5+12/5 / 2/3)]/7/10

原式=[(29/5+1/2)-(3/5+18/5)]/(7/10)
=(29/5+1/2-21/5)*10/7
=(8/5+1/2)*10/7
=(16/10+5/10)*10/7
=(21/10)*(10/7)
=3