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 |