Найди значение суммы или разности

Привет! Сейчас помогу тебе с вычислениями. Нужно найти значения выражений с дробями.

1. 8/7 - 13/35 = (8 * 5)/(7 * 5) - 13/35 = 40/35 - 13/35 = 27/35
2. 8/15 + 2/25 = (8 * 5)/(15 * 5) + (2 * 3)/(25 * 3) = 40/75 + 6/75 = 46/75
3. 1/7 - 1/8 = (1 * 8)/(7 * 8) - (1 * 7)/(8 * 7) = 8/56 - 7/56 = 1/56
4. 3/8 + 7/72 = (3 * 9)/(8 * 9) + 7/72 = 27/72 + 7/72 = 34/72 = 17/36
5. 13/20 - 3/8 = (13 * 2)/(20 * 2) - (3 * 5)/(8 * 5) = 26/40 - 15/40 = 11/40
6. 1/6 + 7/10 = (1 * 5)/(6 * 5) + (7 * 3)/(10 * 3) = 5/30 + 21/30 = 26/30 = 13/15
7. 1/6 - 1/12 = (1 * 2)/(6 * 2) - 1/12 = 2/12 - 1/12 = 1/12
8. 2/25 + 1/9 = (2 * 9)/(25 * 9) + (1 * 25)/(9 * 25) = 18/225 + 25/225 = 43/225
9. 3/4 - 31/42 = (3 * 21)/(4 * 21) - (31 * 2)/(42 * 2) = 63/84 - 62/84 = 1/84
10. 7/12 + 3/20 = (7 * 5)/(12 * 5) + (3 * 3)/(20 * 3) = 35/60 + 9/60 = 44/60 = 11/15
11. 19/21 - 5/6 = (19 * 2)/(21 * 2) - (5 * 7)/(6 * 7) = 38/42 - 35/42 = 3/42 = 1/14
12. 34/45 - 7/10 = (34 * 2)/(45 * 2) - (7 * 9)/(10 * 9) = 68/90 - 63/90 = 5/90 = 1/18
13. 4/21 + 9/14 = (4 * 2)/(21 * 2) + (9 * 3)/(14 * 3) = 8/42 + 27/42 = 35/42 = 5/6
14. 4/9 + 17/63 = (4 * 7)/(9 * 7) + 17/63 = 28/63 + 17/63 = 45/63 = 5/7
15. 11/24 - 7/16 = (11 * 2)/(24 * 2) - (7 * 3)/(16 * 3) = 22/48 - 21/48 = 1/48

Вот ответы: * 27/35 * 46/75 * 1/56 * 17/36 * 11/40 * 13/15 * 1/12 * 43/225 * 1/84 * 11/15 * 1/14 * 1/18 * 5/6 * 5/7 * 1/48

Надеюсь, теперь тебе стало понятнее!