Реши примеры: 12-6+4=, 13+7-1=, 9+8-7=, 0+5=, 11-8=, 2+9=, 20-9+4=, 15-5+4=, 7+8-5=, 6+12=, 13-3=, 9+3=, 13-0=, 20-10-7=, 14-10+6=, 8+5+4=, 6+6-2=, 11-7-4=, 10-9=, 14-7=

Решение:

1. \( 12 - 6 + 4 = 6 + 4 = 10 \)
2. \( 13 + 7 - 1 = 20 - 1 = 19 \)
3. \( 9 + 8 - 7 = 17 - 7 = 10 \)
4. \( 0 + 5 = 5 \)
5. \( 11 - 8 = 3 \)
6. \( 2 + 9 = 11 \)
7. \( 20 - 9 + 4 = 11 + 4 = 15 \)
8. \( 15 - 5 + 4 = 10 + 4 = 14 \)
9. \( 7 + 8 - 5 = 15 - 5 = 10 \)
10. \( 6 + 12 = 18 \)
11. \( 13 - 3 = 10 \)
12. \( 9 + 3 = 12 \)
13. \( 13 - 0 = 13 \)
14. \( 20 - 10 - 7 = 10 - 7 = 3 \)
15. \( 14 - 10 + 6 = 4 + 6 = 10 \)
16. \( 8 + 5 + 4 = 13 + 4 = 17 \)
17. \( 6 + 6 - 2 = 12 - 2 = 10 \)
18. \( 11 - 7 - 4 = 4 - 4 = 0 \)
19. \( 10 - 9 = 1 \)
20. \( 14 - 7 = 7 \)

Ответ: 10, 19, 10, 5, 3, 11, 15, 14, 10, 18, 10, 12, 13, 3, 10, 17, 10, 0, 1, 7.