Впиши пропущенные числа

а)

1. [ ] \(+ 8 = 15\) .
2. [ ] \(+ 4 = 21\) .
3. [ ] \(+ 2 = 30\) .
4. [ ] \(+ 7 = 11\) .
5. [ ] \(-5 = 15\) .
6. [ ] \(-7 = 20\) .
7. [ ] \(-9 = 14\) .
8. [ ] \(-8 = 23\) .
9. [ ] \(+ 17 = 41\) .
10. [ ] \(-19=19\) .
11. [ ] \(- 15 = 27\) .
12. [ ] \(+13=32\) .

б)

1. \(4 + 7+ \) [ ] \(= 16\) .
2. \(17 + 5+\) [ ] \(=22\) .
3. \(15+14+\) [ ] \(=30\) .
4. \(3 + 16+\) [ ] \(=22\) .
5. \(21 -\) [ ] \(=3\) .
6. \(30-\) [ ] \(=11\) .
7. \(23-\) [ ] \(=23\) .
8. \(18-\) [ ] \(=9\) .
9. [ ] \(-16=17\) .
10. \(18+\) [ ] \(=40\) .
11. [ ] \(-16=18\) .
12. [ ] \(+19=28\) .

в)

1. \(14+\) [ ] \(+ 11 = 40\) .
2. \(8 + 15+\) [ ] \(=31\) .
3. \(0+\) [ ] \(+ 8 = 25\) .
4. \(17 + 17+\) [ ] \(=34\) .
5. [ ] \(- 18 = 21\) .
6. \(27-\) [ ] \(=19\) .
7. [ ] \(- 16 = 15\) .
8. \(60-\) [ ] \(=23\) .
9. \(37-\) [ ] \(=9\) .
10. [ ] \(+ 7 = 44\) .
11. \(23-\) [ ] \(= 16\) .
12. \(12+\) [ ] \(=60\) .