能简算的要简算 (1)1/4÷[(1/3+5/6)]*2/7 (2)3/5*[(7/12-1/3)÷3/4] (3)1-5/3÷5/2-1/3(要写出过程)

问题描述:

能简算的要简算 (1)1/4÷[(1/3+5/6)]*2/7 (2)3/5*[(7/12-1/3)÷3/4] (3)1-5/3÷5/2-1/3(要写出过程)

(1)1/4÷[(1/3+5/6)]*2/7
=1/4×7/6×2/7
=1/12
(2)3/5*[(7/12-1/3)÷3/4]
=3/5*(1/4*4/3)
=3/5*1/3
=1/5
(3)1-5/3÷5/2-1/3
=1-5/3*2/5-1/3
=1-(2/3+1/3)
=1-1
=0