Jawabanmu

2014-04-25T22:23:43+07:00
20+50-100(61)
= 70-6100
=-6030

Smga membantu, maaf kalau salah..
2014-04-25T22:40:50+07:00
20+50-100(30+31)=
20+50-100(61)
20+50-6100
70-6100
-5969