Odpowiedź :
Odpowiedź:
1. 7/8
2.6 i 6/10
3. 3 i 7/6, czyli 4 i 1/6
4. 11 i 15/12, czyli 12 i 3/12
5. 7 i 7/10
6. 5 i 1/3
7. 8 i 9/7, czyli 9 i 2/7
8. 7 i 12/10, czyli 8 i 2/10
9. 15 i 5/4, czyli 16 i 1/4
10. 13 i 2/8
11. 2 i 5/8
12. 4/7
13. 2 i 2/3
14. 5 i 1/11
15. 5 i 6/10
16. 6 i 2/5
17. 11 i 3/12
18. 9 i 4/7
19. 4/6
20. 7 i 7/8
Odpowiedź:
1. 3/8 + 4/8 = 7/8
2. 4 2/10 + 2 4/10 = 6 6/10 = 6 3/5
albo
4 2/10 + 2 4/10 = 4 1/5 + 2 2/5 = 6 3/5
3. 3 5/6 + 2/6 = 3 7/6 = 4 1/6
4. 5 7/12 + 6 8/12 = 11 15/12 = 12 3/12 = 12 1/4
5. 4 3/10 + 3 4/10 = 7 7/10
6. 3 + 2 1/8 = 5 1/8
7. 6 4/7 + 2 5/7 = 8 9/7 = 9 2/7
8. 7 5/10 + 7/10 = 7 12/10 = 8 2/10 = 8 1/5
9. 10 3/4 + 5 2/4 = 15 5/4 = 16 1/4
10. 3 2/8 + 10 = 13 2/8
11. 2 7/8 - 2/8 = 2 5/8
12. 6/7 - 2/7 = 4/7
13. 5 - 2 1/3 = 2 2/3
14. 5 2/11 - 1/112 = 5 1/11
15. 6 3/10 - 7/10 = 5 13/10 - 7/10 = 5 6/10 = 5 3/5
16. 11 4/5 - 5 2/5 = 6 2/3
17. 12 1/12 - 10/12 = 11 13/12 - 10/12 = 11 3/12 = 11 1/4
18. 10 2/7 - 5/7 = 9 9/7 - 5/7 = 9 4/7
19. 5 3/6 - 4 5/6 = 4 9/6 - 4 5/6 = 4/6 = 2/3
20. 10 - 2 1/8 = 7 7/8
Szczegółowe wyjaśnienie: