Jawabanmu

2014-08-28T18:39:16+07:00
(3,5 kg + 2 3/4 kg) - 1 2/5 kg = 6,25 kg - 1 2/5 kg = 4,85 kg
2014-08-28T18:39:26+07:00
3/5 + 11/4 = 12/20 + 55/20 = 67/20 - 7/5 = 67/20 - 28/20 = 39/20 = 1 19/20 kg