Ответ:

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Пошаговое объяснение:

Ответ:

Пошаговое объяснение:

Номер 10

А.

1) 7. 7/9 - 4. 1/12 =

7. 28/36 - 4. 3/36 =

3. 25/36

2) 3. 25/36 + 2. 3/4 =

3. 25/36 + 2. 27/36 =

5. 52/36 = 6. 16/36 = 6. 4/9

Б.

1) 3. 11/12 + 4. 4/9 =

3. 33/36 + 4. 16/36 =

7. 49/36 = 8. 13/36

2) 10. 9/16 - 8. 13/36 =

10. 81/144 - 8. 52/144 =

2. 29/144

В.

1) 17. 2/3 - 6. 1/36 =

17. 48/72 - 6. 2/72 = 11. 46/72

2) 11. 46/72 + 4. 3/8 =

11. 46/72 + 4. 27/72 =

15. 73/72 = 16. 1/72

Г.

1) 20 - 10. 23/36 =

19. 36/36 - 10. 23/36 =

9. 13/36

2) 14. 4/27 - 6. 1/18 =

14. 8/54 - 6. 3/54 = 8. 5/54

3) 9. 13/36 - 8. 5/54 =

9. 39/108 - 8. 10/108 =

1. 29/108

Номер 11

А.

1) 5. 5/9 + 3. 1/6 =

5. 30/54 + 3. 9/54 = 8. 39/54

2) 8. 39/54 - 6. 4/27 =

8. 39/54 - 6. 12/54 =

2. 27/54 = 2. 1/2

Б.

1) 9. 17/32 - 4. 5/24 =

9. 51/96 - 4. 20/96 =

5. 31/96

2) 12. 13/48 - 5. 31/96 =

12. 26/96 - 5. 31/96 =

11. 122/96 - 5. 31/96 =

6. 91/96

В.

1) 1. 5/7 + 3. 11/14 =

1. 20/28 + 3. 22/28 =

4. 42/28 = 5. 14/28

2) 5. 14/28 - 2. 1/4 =

5. 14/28 - 2. 7/28 = 3. 7/28 = 3. 1/4

Г.

1) 18 - 10. 18/35 =

17. 35/35 - 10. 18/35 =

7. 17/35

2) 3. 9/28 + 2. 3/20 =

3. 45/140 + 2. 21/140 =

5. 66/140 = 5. 33/70

3) 7. 17/35 - 5. 33/70 =

7. 34/70 - 5. 33/70 = 2. 1/70