1/36÷(-1/4-5/3+7/12)=1/36÷(-3/12-20/12+7/12)=1/36÷(-4/3)=-1/36×3/4=-1/48
=1/36÷(-3/12-20/12+7/12)=1/36÷(-16/12)=1/36×(-12/16)=-1/48
-1/48 一步一步的算啊 ...