Estimate the answer to a calculation and use inverse operations to check answers

1. True or False?: 12 + 14 = 26
2. True or False?: 19 + 13 = 34
3. True or False?: 17 + 19 = 36
4. True or False?: 14 + 17 = 33
5. True or False?: 12 + 13 = 25
6. True or False? 12-6=6
7. True or False: 100 - 47 = 33
8. True or False: 200 - 28 = 172
9. True or False: 30 + 16 - 4 = 44
10. True or False: 30 + 16 - 4 = 42
11. True or False: 30 + 16 - 4 = 46
12. True or False: 12 / 3 = 4
13. True or False: 25 / 5 = 4
14. True or False: 27 / 3 = 9
15. True or False: 30 / 10 = 4
16. True or False: 18 / 2 = 8
17. True or False: 54/6=6÷54
18. True or False: 12/6=6/12
19. True or False: 24/4=400
20. True or False: 30/6=5
21. True or False: 24/2=10
22. True or False: 18/3=6
23. True or False: 25/5=6
24. True or False: 20/5=4