4减中括号3.75乘小括号1.2减1/3加3/4
问题描述：
4减中括号3.75乘小括号1.2减1/3加3/4
答
4-[3.75×(1.2-1/3+3/4)]
=4-[3.75×(6/5-1/3+3/4)]
=4-[3.75×(72/60-20/60+45/60)]
=4-[15/4×97/60]
=4-97/16
=64/16-97/16
=-33/16