(-1/2)+(-1/6)-(-1/4)-(+2/3)题目是这样吗?
=-1/2-1/6+1/4-2/3
=-3/6-1/6+1/4-2/3
=-4/6+1/4-2/3
=-8/12+3/12-8/12
=-13/12
负二分之一加负六分之一减负四分之一减正三分之二怎样算
(-1/2)+(-1/6)-(-1/4)-(+2/3)题目是这样吗?
=-1/2-1/6+1/4-2/3
=-3/6-1/6+1/4-2/3
=-4/6+1/4-2/3
=-8/12+3/12-8/12
=-13/12