Solve problems involving addition, subtraction, multiplication and division and a combination of these, including understanding the meaning of the equals sign

1. Number Detectives: a+b=21 Highest value for axb?
2. Number Detectives: b-a=8, ab=20
3. Number Detectives: a+b=19, ab=84
4. Number Detectives: a+b=13, ab=42
5. Number Detectives: a+b=12, ab=32
6. Number Detectives: a+b=53 ab=150
7. Number Detectives: a+b=13, ab=40
8. Number Detectives: a+b=12 ab=36
9. Number Detectives: a+b=13 Highest value of product?
10. Number Detectives: Sum of 4 consecutive odd nos = 32
11. Number Detectives: Sum of 4 consecutive even nos = 100
12. Make 700: 350+125+?
13. Make 900: 275+375+?
14. Double up and add: Double 40, +4, +10
15. Double up and add: Double 30, +8, +10
16. Double up and add: Double 35, +9, +10
17. Bessie's found her marbles: 327 - (158+57+63+90)
18. True or False?: 6 x 2 = 3 x 6
19. True or False?: 4 x 3 = 2 x 6
20. True or False?: 5 x 5 = 4 x 8
21. True or False?: 4 x 4 = 3 x 5
22. True or False?: 6 x 4 = 2 x 12
23. True or False?: 4 x 5 = 10 x 2
24. True or False?: 5 x 6 = 4 x 8
25. True or False?: 10 x 3 = 6 x 5
26. True or False: 8x4 = 4x8
27. True or False: 5x4 = 2x10
28. True or False: 8x4 = 6x5
29. True or False: 2x6 = 3x4
30. True or False: 3x5 = 2x8
31. Sum it up: Put the correct number statement on the question board
32. Sum it up: Put the correct number statement on the question board
33. Sum it up - Miss Whitland's class
34. Sum it up: Put the correct number statement on the question board
35. Sum it up: Put the correct number statement on the question board
36. Sum it up: Put the correct number statement onto the answer board
37. Sum it up: Put the correct number statement onto the answer board
38. Sum it up:Put the correct number statement on the answer board
39. Sum it up:Put the correct number statement on the answer board
40. Number detectives: Product of 3 and 4) / 2
41. True or False: 80 / 10 = 2 x 4
42. True or False: 24/4=2x3
43. True or False: 32/4=2x3
44. Fair Sharer /4
45. Fair Sharer /6
46. Fair Sharer /9
47. My Fair Sharer: Write the correct division setting on the fair sharer
48. Number detectives: Add 50 to 3x100, then divide by 7
49. Sum it up: Put the correct calculation on the board
50. What Eddie Read - number problem
51. The People On The Bus - number problem
52. Enid the Elephant's Equations - equivalent to 6 + 7 + 9, true/false
53. Logical Leaps - product of consecutive numbers