Ответ:

Пошаговое объяснение:

1.

1) 2. 1/2 + 1. 1/3 = 2. 3/6 + 1. 2/6 = 3. 5/6

2) 3. 5/6 : 1/6 = 23/6 * 6/1 = 23/1 = 23

2.

1) 3 : 1. 1/2 = 3 : 3/2 = 3 * 2/3 = 6/3 = 2

2) 5 : 1. 1/4 = 5 : 5/4 = 5 * 4/5 = 20/5 = 4

3) 2 + 4 = 6

3.

1) 2. 3/11 * 7/9 = 25/11 * 7/9 = 175/99 = 1. 76/99

2) 6. 8/11 : 1. 2/7 = 74/11 : 9/7 = 74/11 * 7/9 = 666/99 = 6. 72/99

3) 1. 76/99 + 6. 72/99 = 7. 148/99 = 8. 49/99

4) 8. 49/99 - 1. 1/8 = 8. 392/792 - 1. 99/792 = 7. 293/792