Step 1
Difficulty 1
1. | Number Detectives ? + 3 = 6 | |
2. | Add these 3 numbers: 8 + 3 + 2 | |
3. | Add these 3 numbers: 9 + 1 + 6 | |
4. | Add Board: 21 + 6 | |
5. | Add Board: 13 + 12 | |
6. | Add Board: 20 + 20 | |
7. | Add Board: 12 + 7 | |
8. | Add Board: 13 + 6 | |
9. | Who's going to Waterworld? 5+4+3+2 | |
10. | Now Add This! 26+21, 26+31 | |
11. | Add three numbers: 7 + 9 + 3 | |
12. | Add three numbers: 4 + 8 + 7 | |
13. | Add three numbers: 6 + 7 + 9 | |
14. | Add three numbers: 13 + 9 + 7 | |
15. | Add three numbers: 20 + 10 + 20 | |
16. | True or False?: 18 + 2 = 20 | |
17. | True or False?: 9 + 8 = 10 | |
18. | True or False?: 42 + 7 = 49 | |
19. | True or False?: 53 + 2 = 60 | |
20. | True or False?: 7 + 8 = 15 | |
21. | Same or Different: Click all the boxes with the answer 25. | |
22. | Same or Different: Click all the boxes with the answer 37. | |
23. | Same or Different: Click all the boxes with the answer 34. | |
24. | Same or Different: Click all the boxes with the answer 26. | |
25. | Same or Different: Click all the boxes with the answer 28. | |
26. | Make 30: 20 + 7 + ? = 30 | |
27. | 100 grid: Start at 73. Add 7. | |
28. | 100 grid: Start at 45. Add 8. | |
29. | 100 grid: Start at 26. Add 5. | |
30. | 100 grid: Start at 68. Add 4. | |
31. | 100 grid: Start at 52. Add 7. | |
32. | N/D Mysteries of 20! 17+, 11+, 15+ | |
33. | N/D Mysteries of 20! 7+, 10+, 8+ | |
34. | N/D Mysteries of 20! 6+, 9+, 3+ | |
35. | N/D Mysteries of 20! 20+, 5+, 2+ | |
36. | Anyone for a burger?: $5 + $6 + $2 | |
37. | Use the Pattern: 4 + 9, + 10, + 11 | |
38. | Use the Pattern: 5 + 9, + 10, + 11 | |
39. | Use the Pattern: 6 + 9, + 10, + 11 | |
40. | Use the Pattern: 7 + 9, + 10, + 11 | |
41. | Use the Pattern: 8 + 9, + 10, + 11 | |
42. | Three Up!: Add 3 to 60, 20, 50 | |
43. | Two Up!!: Add 2 to 23, 15, 37 | |
44. | Two Up!!: Add 2 to 29, 80, 12 | |
45. | Two Up!!: Add 2 to 14, 24, 44 | |
46. | One Up!: Add 1 to 65, 19, 42 | |
47. | Thinking in tens: Add 10, 19 to 19 | |
48. | Thinking in tens: Add 10, 11 to 14 | |
49. | Subtraction chain 9 - 1 = 8, 8 - 2 = ? | |
50. | Subtraction chain 8 - 3 = 5, 5 - 2 = ? | |
51. | Subtraction chain 6 - 2 = 4, 4 - 2 = ? | |
52. | Subtraction chain 7 - 3 = 4, 4 - 1 = ? | |
53. | Subtraction chain 9 - 2 = 7, 7 - 3 = ? | |
54. | Number detectives: 14 - ? = 4 | |
55. | Number detectives: 11 - ? = 5 | |
56. | Number detectives: 10 - ? = 8 | |
57. | Number detectives: 13 - ? = 5 | |
58. | Number detectives: 14 - ? = 7 | |
59. | Card games: Which is lower, 4 + 2 or 6 + 1? | |
60. | Card games: Which is lower, 7 + 3 or 5 + 4? | |
61. | Card games: Which is lower, 6 + 4 or 2 + 3? | |
62. | Card games: Which is lower, 4 + 3 or 1 + 9? | |
63. | Card games: Which is higher, 4 + 5 or 5 + 1? | |
64. | Write the missing number: 15 + 1 + ? = 20 | |
65. | Write the missing number: ? + 11 + 2 = 20 | |
66. | Write the missing number: 3 + 4 + ? = 20 | |
67. | Write the missing number: ? + 5 + 6 = 20 | |
68. | Write the missing number: 5 + 8 + ? = 20 | |
69. | Word Wise: Subtract 14 from 20 | |
70. | Word Wise: 20 take away 11 | |
71. | Word Wise: 14 take away 6 | |
72. | Word Wise: 11 less than 19 | |
73. | Word Wise: 13 less than 20 | |
74. | Word Wise: 11 less than 16 | |
75. | Write the missing number: 4 + 8 + ? = 20 | |
76. | Write the missing number: ? + 13 + 4 = 20 | |
77. | Write the missing number: 4 + ? + 6 = 20 | |
78. | Take 10: ? - 10 = 60 | |
79. | Subtraction chain 20 - 12 = ? - 6 = 2 | |
80. | Write in the missing number: ? + 13 + 5 = 21 | |
81. | True or False?: 29 - 7 = 23 | |
82. | True or False?: 28 - 5 = 21 | |
83. | True or False?: 24 - 2 = 20 | |
84. | True or False?: 9 - 4 = 5 | |
85. | True or False?: 17 - 2 = 15 | |
86. | True or False?: 15 - 3 = 10 | |
87. | True or False?: 8 - 5 = 2 | |
88. | True or False?: 27 - 4 = 23 | |
89. | True or False?: 25 - 5 = 20 | |
90. | Subtraction Chain - 27-20-13 | |
91. | Subtraction Chain - ?-4=21-2=19 | |
92. | Subtraction Chain - 27-4=?-6=17 | |
93. | Subtraction Chain - 28-7=21-5=? | |
94. | Subtract from 100: 100 - 30, 40 & 20 | |
95. | Subtract from 100: 100 - 20, 30 & 70 | |
96. | Subtract from 100: 100 - 70, 20 & 40 | |
97. | Subtract from 100: 100 - 40, 90 & 50 | |
98. | Subtract from 100: 100 - 60, 20 & 100 | |
99. | Subtract 8 (from 16, 15, 12) | |
100. | Subtract 6 (from 12, 11, 13) | |
101. | Subtract 5 (from 14, 11, 8) | |
102. | Subtract 7 (from 14, 16, 11) | |
103. | Who's going to Waterworld? 2+4+3+8 | |
104. | Who's going to Waterworld? 4+4+2+5 | |
105. | Who's going to Waterworld? 2+3+3+10 | |
106. | Who's going to Waterworld? 7+3+2+3 | |
107. | Who's going to Waterworld? 5+4+5+3 | |
108. | 16 go to WaterWorld: 5+4+3+? | |
109. | 17 go to Waterworld: 6+5+2+? | |
110. | 14 go to Waterworld: 6+3+2+? | |
111. | 18 go to WaterWorld: 3+3+2+? | |
112. | 15 go to WaterWorld: 5+3+2+? | |
113. | 16 go to Waterworld? 2+3+3+? | |
114. | Card games: Which is higher, 5 + 4 or 3 + 7? | |
115. | Card games: Which is higher, 3 + 5 or 4 + 8? | |
116. | Card games: Which is higher, 5 + 9 or 6 + 4? | |
117. | Card games: Which is higher, 4 + 6 or 9 + 3? | |
118. | Card games: Which is lower, 9 + 3 or 6 + 7? | |
119. | Card games: Which is lower, 2 + 6 or 4 + 2? | |
120. | The 20s Zone: Take 6 from 24 | |
121. | The 20s Zone: Take 8 from 24 | |
122. | The 20s Zone: Take 6 from 25 | |
123. | The 20s Zone: Take 4 from 21 | |
124. | The 20s Zone: Take 8 from 25 | |
125. | The 20s Zone: Take 9 from 23 | |
126. | The 20s Zone: Take 7 from 23 | |
127. | The 20s Zone: Take 8 from 26 | |
128. | The 20s Zone: Take 7 from 22 | |
129. | The 20s Zone: Take 8 from 27 |