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) |