Generalise the properties of addition and subtraction with whole numbers

Generalise the properties of addition and subtraction with whole numbers

1. Complem. add/subtract: 136+419=555
2. Complem. add/subtract: 216+84=300
3. Complem. add/subtract: 112+32=144
4. Complem. add/subtract: 125+14=139
5. Complem. add/subtract: 105+24=129
6. Complem. add/subtract: 210+14=224
7. Comp. pairs add/subtract: 678+156=834
8. Comp. pairs add/subtract: 246+357=603
9. Comp. pairs add/subtract: 545+328=873
10. Comp. pairs add/subtract: 488+323=811
11. Comp. pairs add/subtract: 493+257=750
12. Complementary pairs: 347+454=801
13. Complementary pairs: 482+395=877
14. Complementary pairs: 278+596=874
15. Complementary pairs: 532+209=741
16. Complementary pairs: 627+277=904
17. Complem. add/subtract: 652-547=105
18. Complem. add/subtract: 845-69=776
19. Complem. add/subtract: 492-116=376
20. Complem. add/subtract: 831-88=743
21. Complem. add/subtract: 634-97=537
22. Complem. add/subtract: 263-84=179
23. Complem. add/subtract: 751-47=704
24. Complem. add/subtract: 397-59=338
25. Complementary add/sub: 8236-547=7689
26. Complementary add/sub: 2815-492=2323
27. Complementary add/sub: 5730-166=5564
28. Complementary add/sub: 1073-561=512
29. Complementary add/sub: 6923-784=6139
30. True or False?: 4 x 3 = 2 x 6
31. True or False?: 10 x 0 = 5 x 0
32. True or False?: 6 x 4 = 2 x 12
33. True or False?: 10 x 3 = 6 x 5
34. True or False: 8x4 = 4x8
35. True or False: 5x4 = 2x10
36. True or False: 2x6 = 3x4
37. True or False: 54/6=6÷54