Jawabanmu

2014-09-01T18:15:06+07:00
Samakan penyebutnya
5/6 - 1/12 + 1/20
=48/60
=4/5
1 3 1
2014-09-01T18:16:43+07:00
(1/2+1/3)+(1/4+(-1/3))+1/20=
5/6 + (-1/12) + 1/20 =
50-5+3 per 60 = 48/60
                     = 4/5