Step 2

Difficulty 2

1. Mystery number: ?+6=512
2. Mystery number: 157+?=163
3. Mystery number: 133+?=146
4. Mystery number: 212+?=224
5. Mystery number: 106+?=118
6. Mystery number: 106+?=118
7. On the Board: *24 + 92= 6**
8. On the Board: **1 + 38= 30*
9. On the Board: *4*+*6=569
10. On the Board: 81*+*6=*09
11. On the Board: 7**+102=*97
12. On the Board: 53*+*2=*29
13. On the Board: 6*+*2=100
14. On the Board: *6+2*=100
15. On the Board: 4*+*7=100
16. Adding Tens: 142+?=182
17. Adding Tens: 30+?=574
18. 100 zone: 796+7,794+8,799+6
19. 100 zone: 593+7,594+8,596+5
20. 100 zone: 693+9,695+8,697+7
21. 100 zone: 392+6,393+7,392+8
22. 100 zone: 196+9,194+7,197+5
23. Add it up: Addition with regrouping 769+45
24. Add it up: Addition with regrouping 777+58
25. Changing numbers 683-554
26. Changing numbers 257-138
27. Changing numbers 884-763
28. Changing numbers 576-557
29. Changing numbers 794-683
30. Changing numbers 461-432
31. Write the missing number: ? + 104 + 15 = 126
32. Write the missing number: 110 + ? + 107 = 229
33. Write the missing number: 109 + ? + 115 = 330
34. Write the missing number: 21 + 107 + ? = 137
35. Write the missing number: 125 + ? + 5 = 142
36. Write the missing number: 118 + ? + 20 = 145
37. Write the missing number: 13 + ? + 126 = 148
38. Use the pattern: 40 - 6, 400 - 60, 4000 - 600
39. Use the pattern: 60 - 2, 600 - 20, 6000 - 200
40. Use the pattern: 50 - 9, 500 - 90, 5000 - 900
41. Use the pattern: 80 - 5, 800 - 50, 8000 - 500
42. Use the pattern: 90 - 8, 900 - 80, 9000 - 800
43. Hundreds takeaway: *53-*7=61*
44. Hundreds takeaway: *42 - 5*9 = 31*
45. Hundreds takeaway: *75 - 2*6 = 10*
46. Hundreds takeaway: *43 - 2*7 = 20*
47. Hundreds takeaway: *82-4*7 = 18*
48. Take Tens: 45-?=35,580-90=?
49. Take Tens: 62-?=22,880-50=?
50. Take Tens: 73-?=53,630-90=?
51. Take Tens: 98-?=18,920-60=?
52. Complem. add/subtract: 652-547=105
53. Complem. add/subtract: 845-69=776
54. Complem. add/subtract: 492-116=376
55. Complem. add/subtract: 831-88=743
56. Complem. add/subtract: 634-97=537
57. Complem. add/subtract: 263-84=179
58. Complem. add/subtract: 751-47=704
59. Complem. add/subtract: 397-59=338
60. Spot the difference: 175-162, 187-170, 264-243 =?
61. Spot the difference: 360-345, 122-108, 754-742 =?
62. Spot the difference: 217-201, 184-167, 340-321 =?
63. Spot the difference: 609-597, 99-118, 77-105 =?
64. Spot the difference: 360-375, 129-118, 156-140 =?
65. Take it away 154-36=118
66. Take it away 763-57=706
67. Take it away 681-29=652
68. Hundreds Takeaway: *00-26*=35
69. Bargain basement: $50-(2x$5+$10)
70. True or False?: 99-66=44-11
71. True or False?: 73-3=93-20
72. True or False?: 44-4=60-20
73. Deepa at the shop: $2 - (40c + 70c)