Question

сколько будет 1)4/5+3/4 2)5/6+3/8 3)9/10-5/6 4)3/4+3/14 5)7/10-1/4 6)8/15+3/10 7)4/9+1/6 8)2/51+4/17 9)4/25+9/10 10)1/12+7/10 11)5/18+7/12 12)5/12+4/15 13)3/14+7/12 14)3/20+11/30 15)1/30+2/45 16)7/50+2/45

Answer 1

1) $\frac{4}{5} + \frac{3}{4} = \frac{16+15}{20} = \frac{31}{20}$
2) $\frac{5}{6} + \frac{3}{8} = \frac{20+9}{24} = \frac{29}{24}$
3) $\frac{9}{10} - \frac{5}{6} = \frac{27-25}{30} = \frac{2}{30} = \frac{1}{15}$
Дальше давай ка сам, приводи к общему знаменателю и решай

Answer 2

Давайте рассчитаем каждое из этих сложений и вычитаний:

1. 4/5 + 3/4 = (16/20) + (15/20) = 31/20

2. 5/6 + 3/8 = (20/24) + (9/24) = 29/24

3. 9/10 - 5/6 = (27/30) - (25/30) = 2/30 = 1/15

4. 3/4 + 3/14 = (21/28) + (6/28) = 27/28

5. 7/10 - 1/4 = (14/20) - (5/20) = 9/20

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

7. 4/9 + 1/6 = (16/36) + (6/36) = 22/36 = 11/18

8. 2/51 + 4/17 = (8/204) + (48/204) = 56/204 = 14/51

9. 4/25 + 9/10 = (16/100) + (45/50) = 61/100

10. 1/12 + 7/10 = (5/60) + (42/60) = 47/60

11. 5/18 + 7/12 = (15/54) + (21/54) = 36/54 = 2/3

12. 5/12 + 4/15 = (25/60) + (16/60) = 41/60

13. 3/14 + 7/12 = (9/42) + (49/42) = 58/42 = 29/21

14. 3/20 + 11/30 = (9/60) + (22/60) = 31/60

15. 1/30 + 2/45 = (2/60) + (4/60) = 6/60 = 1/10

16. 7/50 + 2/45 = (63/450) + (20/450) = 83/450