Step 1
Difficulty 1
1. | Add Board: 60 + 23 | |
2. | Add Board: 30 + 70 | |
3. | Add Board: 40 + 60 | |
4. | Add Board: 63 + 20 | |
5. | Adding tens: 26 + ? = 36 | |
6. | Adding tens: 46 + ? = 56 | |
7. | Adding tens: 64 + ? = 94 | |
8. | Changing numbers 136 to 140 | |
9. | Changing numbers 122 to 130 | |
10. | Changing numbers 154 to 160 | |
11. | Changing numbers 188 to 190 | |
12. | Changing numbers 177 to 180 | |
13. | On the board 963 + 5 = ? | |
14. | On the board 242 + 6 = ? | |
15. | On the board 781 + 8 = ? | |
16. | On the board 427 + 2 = ? | |
17. | On the board 113 + 4 = ? | |
18. | On The Board 135+100 | |
19. | Add Board: 45 + 34 = ? | |
20. | Add Board: 67 + 12 = ? | |
21. | Add Board: 32 + 65 = ? | |
22. | 100 Zone: 95+7=? 101-?=99 ?+6=103 | |
23. | 100 Zone: 95+6=? 103-?=99 ?+6=104 | |
24. | 100 Zone: 98+7=? 105-?=98 ?+6=105 | |
25. | 100 Zone: 98+6=? 102-?=98 ?+5=103 | |
26. | 100 Zone: 98+3=? 101-?=97 ?+5=102 | |
27. | Changing Numbers 14 to 54 | |
28. | Changing Numbers 35 to 85 | |
29. | Number detectives *+109 = 113 | |
30. | Number detectives *+4 = 103 | |
31. | Number detectives *+5 = 103 | |
32. | Number detectives 95+*=101 | |
33. | Number detectives 97+*=103 | |
34. | Use The Pattern 3+5 30+50 300+500 | |
35. | Use The Pattern 3+6 30+60 600+300 | |
36. | Use The Pattern 2+4 20+40 200+400 | |
37. | Use The Pattern 3+2 30+20 200+300 | |
38. | Use The Pattern 6+2 60+20 600+200 | |
39. | Addition Chains 21 + 3 + 6 + 5, 60 + 4 + 3 + 2 | |
40. | Addition Chains 33 + 4 + 10 + 5, 28 + 3 + 9 + 8 | |
41. | Addition Chains 23 + 5 + 4 + 9, 60 + 8 + 3 + 10 | |
42. | Addition Chains 95 + 4 + 2 + 12, 94 + 3 + 3 + 7 | |
43. | Addition Chains 100 + 5 + 5 + 7, 99 + 3 + 6 + 2 | |
44. | Beyond 90: 98 + 4 | |
45. | Beyond 100: 104 + 7 | |
46. | Beyond 110: 119+3 | |
47. | Beyond 120: 128+6 | |
48. | Beyond 130: 139 + 5 | |
49. | Number detectives: 60+?, 50+?, 75+?=100 | |
50. | Taking tens: 40 - 30 = ? | |
51. | Taking tens: 50 - 20 = ? | |
52. | Taking tens: 80 - 40 = ? | |
53. | Taking tens: 70 - 10 = ? | |
54. | Taking tens: 70 - 40 = ? | |
55. | Taking tens: 40 - 30 = ? | |
56. | Anyone for a burger: $20 - ($4 + $6) | |
57. | Anyone for a burger: $20 - ($5 + $6) | |
58. | Anyone for a burger: $20 - ($6 + $5) | |
59. | Anyone for a burger?: $20 - ($4 + $6) | |
60. | Bargain Basement: $15 - ($8 + $6) | |
61. | Takeaway board 87-53 | |
62. | Takeaway board 29-15 | |
63. | Takeaway board 45-21 | |
64. | Takeaway board 77-34 | |
65. | Takeaway board 18-12 | |
66. | Use the pattern: 9-5, 90-50, 900-500 | |
67. | Use the pattern: 8-5, 80-50, 800-500 | |
68. | Use the pattern: 6-2, 60-20, 600-200 | |
69. | Takeaway board: 65-34 | |
70. | Takeaway board: 48-26 | |
71. | Taking Tens: 44 - 20 | |
72. | Taking Tens: 68 - 30 | |
73. | Subtract.chains 32 - 4 - 7 - 4, 45 - 2 - 10 - 5 | |
74. | Spot the difference: 102 & 97, 27 & 19, 100 & 60 | |
75. | Write the missing number: 7 + ? + 14 = 30 | |
76. | Write the missing number: 15 + 4 + ? = 30 | |
77. | Write the missing number: 12 + 10 + ? = 30 | |
78. | Write the missing number: 15 + 5 + ? = 30 | |
79. | Write the missing number: 18 + 8 + ? = 30 | |
80. | Write the missing number: 5 + 5 + ? = 30 | |
81. | Number Detectives: ? - 15 = 10 | |
82. | Number Detectives: ? - 9 = 21 | |
83. | Number Detectives: 30 - 17 = ? | |
84. | Number Detectives: 30 - 14 = ? | |
85. | Number Detectives: 30 - ? = 12 | |
86. | Number Detectives: 40 - ? = 29 | |
87. | Take Ten 42 - 10 | |
88. | Subtract 2, 12 from 100 | |
89. | Subtract 3, 13 from 100 | |
90. | Subtract 5, 15 from 100 | |
91. | Subtract 7, 17 from 100 | |
92. | Subtract 8, 18 from 100 | |
93. | Subtract 4, 14 from 100 | |
94. | Find first number: After I count back 5, the new number is 299. Where did I start? | |
95. | Find first number: After I count back 4, the new number is 197. Where did I start? | |
96. | Find first number: After I count back 6, the new number is 395. Where did I start? | |
97. | Find first number: After I count back 7, the new number is 596. Where did I start? | |
98. | Find first number: After I count back 8, the new number is 95. Where did I start? | |
99. | Subtracting tens: 88 - ? = 48 | |
100. | Subtracting tens: 57 - ? = 27 | |
101. | Subtracting tens: 44 - ? = 24 | |
102. | The Mysteries of 40!: 40-?=31, 40-?=33, 40-?=30 | |
103. | The Mysteries of 40!: 40-?=51, 40-?=38, 40-?=32 | |
104. | The Mysteries of 40!: 40-?=29, 40-?=31, 40-?=33 | |
105. | The Mysteries of 40!: 40-?=28, 40-?=32, 40-?=18 | |
106. | The Chicken Story: forty-one - thirty-three | |
107. | The Chicken Story: seventy-six - sixty-five | |
108. | Emma at the shop: 25c + 15c | |
109. | Charlotte at the shop: 60c + 25c | |
110. | Marjorie at the shop: 70c + 15c | |
111. | Felicity at the shop: 50c + 45c |