Jawabanmu

2014-04-24T20:13:44+07:00
16 x 31,7 = 507,2 15 x 31,7 = 475,5 507,2 - 475,5 = 31,7
2014-04-24T20:16:33+07:00
(16 anak x 31.7 kg) - (15 anak x 31.5kg)
= 507.2- 472.5
= 34.7 kg


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