Ответ:

Пошаговое объяснение:

Р.

1) 3. 2/5 + 1. 7/10 =

3. 4/10 + 1. 7/10 =

4. 11/10 = 5. 1/10

2) 5. 1/10 * 1. 3/17 =

51/10 * 20/17 = 3/1 * 2/1 = 6/1 = 6

3) 2. 7/23 - 1. 45/46 =

2. 14/46 - 1. 45/46 =

1. 60/46 - 1. 45/46 = 15/46

4) 15/46 * 69/80 = 3/2 * 3/16 = 9/32

5) 6 - 9/32 = 5. 32/32 - 9/32 = 5. 23/32

6) 5. 23/32 * 1. 1/3 =

183/32 * 4/3 = 61/8 * 1/1 =

61/8 = 7. 5/8

Ответ: 7. 5/8

С.

1) 1. 2/13 * 2. 1/10 =

15/13 * 21/10 = 3/13 * 21/2 = 63/26 = 2. 11/26

2) 2/13 * 13. 1/2 = 2/13 * 27/2 = 27/13 = 2. 1/13

3) 2. 11/26 - 2. 1/13 =

2. 11/26 - 2. 2/26 = 9/26

4) 3. 11/18 * 9/26 =

65/18 * 9/26 = 65/2 * 1/26 = 65/52 = 1. 13/52 = 1. 1/4

5) 4. 2/3 * 3. 3/4 =

14/3 * 15/4 = 7/1 * 5/2 = 35/2 = 17. 1/2

6) 6/7 * 7. 14/15 =

6/7 * 119/15 = 2/1 * 17/5 =

34/5 = 6. 4/5

7) 17. 1/2 - 6. 4/5 =

17. 5/10 - 6. 8/10 =

16. 15/10 - 6. 8/10 =

10. 7/10

8) 5 * 10. 7/10 = 5 * 107/10 = 1 * 107/2 = 107/2 = 53. 1/2

9) 1. 1/4 + 53. 1/2 =

1. 1/4 + 53. 2/4 = 54. 3/4

Ответ: 53. 3/4