Question

三分之一加负六分之五减负二分之一减三分之二

Answer 1

原式=1/3+(-5/6)-(-1/2)-2/3
=1/3-5/6+1/2-2/3
=(1/3+1/2-5/6)-2/3
=(2/6+3/6-5/6)-2/3
=0-2/3
=-2/3