4,5 + 6 2/7 + 2 1/4 = 4 5/10 + 6 8/28 + 2 7/28 = 4 1/2 + 8 15/28 = 4 14/18 + 8 15/28 =
= 12 29/28 = 13 1/28
4,5 + 6 2/7 + 2 1/4 = 4 5/10 + 6 8/28 + 2 7/28 = 4 1/2 + 8 15/28 = 4 14/18 + 8 15/28 =
= 12 29/28 = 13 1/28