Jawabanmu

2014-08-11T20:43:19+07:00
Pake nalar aja :v
pertama
1+99 = 100
2+98 = 100
............
49+51 = 100
sisa 50 dan 100
berarti 100 x 49 +100 + 50
5050
2014-08-11T21:38:19+07:00