Question

1. 2/7 + 3/7. 2. 1/4 +3/8. 3. 1/6 +5/12. 4. 1/8 + 5/12. 5.2/9 + 7/15. 6 8/15 + 3/10. 7. 7/10 +9/25. 8. 2/9, 5/12+1/36. 9. 1/3 , 7/12+ 5/8. 10. 2/5, 3/10+ 8/15 помогите пожалуйста 20 баллов

Answer 1

Ответ:

Пошаговое объяснение:

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

2. 1/4 +3/8 = 2/8+3/8 = 5/8.

3. 1/6 +5/12 = (2+5)/12 = 7/12.

4. 1/8 + 5/12 = (3+10)/24 = 13/24.

5.2/9 + 7/15 = (10+21)/45 = 31/45.

6 8/15 + 3/10 = (16+9)/30 = 25/30 = 5/6.

7. 35/50+18/50 = 53/50 = 1 3/50.

8. 2/9, 5/12+1/36.   -???  (2/9 - ?)

9. 1/3 , 7/12+ 5/8.   -???   (1/3 - ?)

10. 2/5, 3/10+ 8/15.  -???  (2/5 -?)