1.(-0.5)-(-3又1/4)+2.75-(+7又1/2)2.2又3/3+0.25-(7又1/2)+(-2又1/4)-1.5-2.753.-0.5+(-15)-(-17)-|-12|

问题描述:

1.(-0.5)-(-3又1/4)+2.75-(+7又1/2)
2.2又3/3+0.25-(7又1/2)+(-2又1/4)-1.5-2.75
3.-0.5+(-15)-(-17)-|-12|

第一题-8第二题4又1/4第三题-10.5

1. =-2 2. =-10.25 3. =-34.5

1.=-2
2.=-10.25
3.=-34.5