Для варианта 4 необходимо выполнить следующие вычисления:
1) 3 2/4 + 1/3 = 3 6/12 + 4/12 = 3 10/12 = 3 5/6
2) 1 1/2 + 1/5 = 1 5/10 + 2/10 = 1 7/10
3) 5 1/9 + 1/3 = 5 1/9 + 3/9 = 5 4/9
4) 5 1/12 + 1/3 = 5 1/12 + 4/12 = 5 5/12
5) 1 1/24 + 1/18 = 1 3/72 + 4/72 = 1 7/72
6) 1 1/2 + 1/3 = 1 3/6 + 2/6 = 1 5/6
7) 6 1/11 + 1/33 = 6 3/33 + 1/33 = 6 4/33
8) 1 1/2 + 1/3 = 1 3/6 + 2/6 = 1 5/6
9) 19 1/20 + 1/40 = 19 2/40 + 1/40 = 19 3/40
10) 7 7/23 + 1/46 = 7 14/46 + 1/46 = 7 15/46
11) 3 5/42 + 1/21 = 3 5/42 + 2/42 = 3 7/42 = 3 1/6
12) 4 3/11 + 1/19 = 4 57/209 + 11/209 = 4 68/209
13) 1 1/400 + 1/30 = 1 3/1200 + 40/1200 = 1 43/1200
14) 7 5/6 + 1/3 = 7 5/6 + 2/6 = 7 7/6 = 8 1/6
15) 10 1/20 + 1/2 = 10 1/20 + 10/20 = 10 11/20
16) 7 1/21 + 1/3 = 7 1/21 + 7/21 = 7 8/21
Итоговые значения:
3 5/6, 1 7/10, 5 4/9, 5 5/12, 1 7/72, 1 5/6, 6 4/33, 1 5/6, 19 3/40, 7 15/46, 3 1/6, 4 68/209, 1 43/1200, 8 1/6, 10 11/20, 7 8/21.