а) 5 целых 7/8 + 6 целых 3/10 = 5 + 6 + 7/8 + 3/10 = 11 + 35/40 + 24/40 = 11 + 59/40 = 12 целых 19/40
б) 6 целых 3/8 + 2 целых 5/9 = 6 + 2 + 3/8 + 5/9 = 8 + 27/72 + 40/72 = 8 + 67/72 = 9 целых 19/72
в) 1 целая 8/21 + 4 целых 3/14 + 2 целые 2/7 = 1 + 4 + 2 + 8/21 + 18/28 + 4/7 = 7 + 126/294 + 189/294 + 168/294 = 7 + 483/294 = 8 целых 195/294
а) 5 целых 7/8 + 6 целых 3/10 = 5 + 6 + 7/8 + 3/10 = 11 + 35/40 + 24/40 = 11 + 59/40 = 12 целых 19/40
б) 6 целых 3/8 + 2 целых 5/9 = 6 + 2 + 3/8 + 5/9 = 8 + 27/72 + 40/72 = 8 + 67/72 = 9 целых 19/72
в) 1 целая 8/21 + 4 целых 3/14 + 2 целые 2/7 = 1 + 4 + 2 + 8/21 + 18/28 + 4/7 = 7 + 126/294 + 189/294 + 168/294 = 7 + 483/294 = 8 целых 195/294