Question

3.(8баллов).Вычислите:
а. 13-(5 7/12-1 4/15+3/4)=
b. 9 11/18-5 3/4+2 7/9-1 15/36
c. (6 1/4-4 1/8)•4+3 1/3:2 1/2
d. (19 2/5+28 9/40): 15 7/8+24 3/8
Помогите дам много баллов.
Это СОЧ за четверть!!!!Побыстрее умоляю.....
​

Answer 1

Ответ:

Пошаговое объяснение:

А)

1) 5. 7/12 - 1. 4/15 + 3/4 =

5. 35/60 - 1. 16/60 + 45/60 = 4. 19/60 + 45/60 = 4. 64/60 = 5. 4/60 = 5. 1/15

2) 13 - 5. 1/15 = 12. 15/15 - 5. 1/15 = 7. 14/15

В)

= 9. 22/36 - 5. 27/36 + 2. 28/36 - 1. 15/36 =

8. 58/36 - 5. 27/36 + 2. 28/36 - 1. 15/36 =

3. 31/36 + 2. 28/36 - 1. 15/36 = 4. 44/36 = 5. 8/36 = 5. 2/9

С)

1) 6. 1/4 - 4. 1/8 = 6. 2/8 - 4. 1/8 = 2. 1/8

2) 2. 1/8 * 4 = 33/8 * 4 = 33/2 * 1 = 33/2 = 16. 1/2

3) 3. 1/3 : 2. 1/2 = 10/3 : 5/2 = 10/3 * 2/5 = 20/15 = 4/3 = 1. 1/3

4) 16. 1/2 + 1. 1/3 = 16. 3/6 + 1. 2/6 = 17. 5/6

Д)

1) 19. 2/5 + 28. 9/40 =

19. 16/40 + 28. 9/40 =

47. 25/40 = 47. 5/8

2) 47. 5/8 : 15. 7/8 = 381/8 : 127/8 = 381/8 * 8/127 = 381/127 = 3

3) 3 + 24. 3/8 = 27. 3/8