1.8-[1÷(0.75+1/3)]×13/8简便拖式1个小时之内回答.

Question

1.8-[1÷(0.75+1/3)]×13/8 简便 拖式
1个小时之内回答.

Answer 1

1.8-[1÷(0.75+1/3)]×13/8
=1.8-[1÷13/12]×13/8
=1.8-12/13×13/8
=1.8-1.5
=0.3