[(1.4+1/2)÷10.4-1/6]X72% (要有过程)

问题描述:

[(1.4+1/2)÷10.4-1/6]X72% (要有过程)

[(1.4+1/2)÷10.4-1/6]X72%
=(13/5÷42/5-1/6)*0.72
=(13/42-1/6)*0.72
=5/42*23/25
=13/210