Jawabanmu

2014-01-29T21:19:48+07:00
2014-01-29T21:19:54+07:00
(5-7)+3= -1
3+(-6)+(-10)= -13
8-4-5= -1
20+15-(-17)= 18
-5-8+(-7)= -20
20-(-7)+20= 33