4分之3减0.6乘(2又12分之五减1.75)

问题描述:

4分之3减0.6乘(2又12分之五减1.75)
用拖式做

4分之3减0.6乘(2又12分之五减1.75)
=3/4-3/5x(29/12-7/4)
=3/4-3/5x(29/12-21/12)
=3/4-3/5x2/3
=3/4-2/5
=7/20