4 7/9•1 13/14-3 7/12•1 13/14+1 13/14•1 13/18

4 7/9 * 1 13/14 - 3 7/12 * 1 13/14 + 1 13/14 * 1 13/18 = 5 5/8;

Первое действие.

4 7/9 * 1 13/14 = 4 * 9 + 7/9 * 1 * 14 + 13/14 = 43/9 * 27/14 = 43 * 27/9 * 14 = 1161/126 = 129 * 9/14 * 9 = 129/14 = 3 + 9 * 14/14 = 9 3/14;

Второе действие.

3 7/12 * 1 13/14 = 3 * 12 + 7/12 * 1 * 14 + 13/14 = 43/12 * 27/14 = 43 * 27/12 * 14 = 1161/168 = 387 * 3/56 * 3 = 387/56 = 51 + 6 * 56/56 = 6 51/56;

Третье действие.

9 3/14 - 6 51/56 = 9 * 14 + 3/14 - 6 * 56 + 51/56 = 129/14 - 387/56 = 129 * 56/14 * 56 - 387 * 14/56 * 14 = 7224/784 - 5418/784 = 7224 - 5418/784 = 1806/784 = 129 * 14/56 * 14 = 129/56 = 17 + 2 * 56/56 = 2 17/56;

Четвертое действие.

1 13/14 * 1 13/18 = 1 * 14 + 13/14 * 1 * 18 + 13/18 = 27/14 * 31/18 = 27 * 31/14 * 18 = 837/252 = 93 * 9/28 * 9 = 93/28 = 9 + 3 * 28/28 = 3 9/28;

Пятое действие.

2 17/56 + 3 9/28 = 2 * 56 + 17/56 + 3 * 28 + 9/28 = 129/56 + 93/28 = 129 * 28/56 * 28 + 93 * 56/28 * 56 = 3612/1568 + 5208/1568 = 3612 + 5208/1568 = 8820/1568 = 45 * 196/8 * 196 = 45/8 = 5 + 5 * 8/8 = 5 5/8.