Step 3
Difficulty 3
| 1. | Add these 3 numbers: 4 + 4 + 3 | |
| 2. | True or False?: 21 + 4 = 25 | |
| 3. | True or False?: 23 + 2 = 27 | |
| 4. | True or False?: 26 + 3 = 29 | |
| 5. | True or False?: 24 + 4 = 25 | |
| 6. | True or False?: 22 + 6 = 28 | |
| 7. | Same or different? Click all boxes with answer 18 | |
| 8. | Same or Different? Click all boxes with answer 16 | |
| 9. | Number detectives: Mysteries of 15 | |
| 10. | Number detectives: Mysteries of 16 | |
| 11. | Number detectives: Mysteries of 13 | |
| 12. | Number detectives: Mysteries of 17 | |
| 13. | Number detectives: Mysteries of 14 | |
| 14. | Now Add This! 52+20, 52+17 | |
| 15. | Addition Chains | |
| 16. | Addition Chains | |
| 17. | Addition Chains | |
| 18. | Addition Chains | |
| 19. | Addition Chains | |
| 20. | 40s zone: 4 more than 38 | |
| 21. | 40s zone: 4 more than 39 | |
| 22. | 50s zone: Add on 5 to 47. | |
| 23. | 50s zone: 48 plus 5 | |
| 24. | 50s zone: 5 more than 46 | |
| 25. | Bargain Basement: $3 + (2x$2) + $10 | |
| 26. | True or False?: 15 + 5 = 20 | |
| 27. | True or False?: 16 + 3 = 18 | |
| 28. | True or False?: 16 + 4 = 20 | |
| 29. | Number Detectives: 24 + 6 = ? | |
| 30. | Number Detectives: 5 + 25 = ? | |
| 31. | Make 50: 40 + 4 + ? | |
| 32. | Make 34: 10 + 22 + ? | |
| 33. | Add on tens: Add 10, 20 to 35 | |
| 34. | Add on tens: Add 10, 20 to 16. | |
| 35. | Add on tens: Add 10, 20 to 36 | |
| 36. | Addition Chains: 4 + 5 + 6 + 8, 11 + 4 + 3+ 7 | |
| 37. | Addition Chains: 3 + 2 + 4 + 8, 4 + 3 + 7 + 4 | |
| 38. | Add three numbers: 11 + 14 + 5 | |
| 39. | True or False: 7+8=12 | |
| 40. | True or False: 17+2=20 | |
| 41. | True or False: 10+9=19 | |
| 42. | True or False: 22+4=23 | |
| 43. | True or False: 9+6=15 | |
| 44. | Number detectives: 22+9 = ? | |
| 45. | Number detectives: 51+11 = ? | |
| 46. | Number detectives: 35+? = 46 | |
| 47. | Add Board: 24 + 15 = ? | |
| 48. | Add Board: 25 + 13 = ? | |
| 49. | Beyond 40: 6 more than 45 | |
| 50. | Beyond 60: 8 more than 68 | |
| 51. | Beyond 50: 7 more than 58 | |
| 52. | N/D Mysteries of 40! 34+? 30+? 38+?=40 | |
| 53. | N/D Mysteries of 40! 31+? 36+? 30+?=40 | |
| 54. | N/D Mysteries of 40! 33+? 37+? 32+?=40 | |
| 55. | N/D Mysteries of 40! 32+? 39+? 34+?=40 | |
| 56. | N/D Mysteries of 40! 31+? 35+? 37+?=40 | |
| 57. | Leah's Fruit Salad: 25c + 40c | |
| 58. | Roberto's Fruit Salad: 25c + 40c | |
| 59. | Isabelle's Fruit Salad: 45c + 40c | |
| 60. | Laura's Fruit Salad: 20c + 40c | |
| 61. | Connor's Fruit Salad: 20c + 45c | |
| 62. | The 1 Family - Add 1, add 11 to 35 | |
| 63. | The 1 Family - Add 1, add 11 to 27 | |
| 64. | The 1 Family - Add 1, add 11 to 49 | |
| 65. | The 1 Family - Add 1, add 11 to 57 | |
| 66. | The 1 Family - Add 1, add 11 to 83 | |
| 67. | Number detectives: ? - 5 = 10 | |
| 68. | Number detectives: ? - 7 = 6 | |
| 69. | Number detectives: ? - 8 = 4 | |
| 70. | True or False? 10-5=20-5 | |
| 71. | Put in the missing number: 9 + 2 + ? = 19 | |
| 72. | Put in the missing number: ? + 10 + 14 = 28 | |
| 73. | Subtraction Chain - 21-4 =?-1= 16 | |
| 74. | Taking ten: 46-10 | |
| 75. | Taking ten: 72-10 | |
| 76. | Taking ten: 39-10 | |
| 77. | Taking ten: 55-10 | |
| 78. | Taking ten: 81-10 | |
| 79. | Mysteries of Fifty: 50-?=42, 50-?=45 | |
| 80. | Mysteries of Forty: 40-?=36, 40-?=31 | |
| 81. | Mysteries of Forty: 40-?=33, 40-?=39 | |
| 82. | Mysteries of Forty: 40-?=35, 40-?=38 | |
| 83. | True or False?: 21 - 16 = 4 | |
| 84. | True or False?: 18 - 9 = 8 | |
| 85. | True or False?: 24 - 15 = 8 | |
| 86. | True or False?: 22 - 10 = 11 | |
| 87. | True or False?: 19 - 13 = 6 | |
| 88. | True or False?: 26 - 13 = 13 | |
| 89. | Use the pattern 16-7=? 26-7=?, 36-7=? | |
| 90. | Use the pattern 11-5=? 21-5=?, 31-5=? | |
| 91. | Use the pattern 17-8=? 27-8=?, 37-8=? | |
| 92. | 100 grid: 76 take away 7 | |
| 93. | 100 grid: 54 take away 8 | |
| 94. | 100 grid: 64 take away 9 | |
| 95. | 100 grid: 23 take away 7 | |
| 96. | 100 grid: 71 take away 8 | |
| 97. | 100 grid: 34 take away 6 | |
| 98. | The 9 family: Take 9, 19 & 29 from 65 | |
| 99. | The 9 family: Take 9, 19 & 29 from 72 | |
| 100. | Same Difference - Difference between 10 and 40. | |
| 101. | Write the missing number: 18 + ? + 2 = 30 | |
| 102. | Write the missing number: ? + 13 + 5 = 30 | |
| 103. | Write the missing number: 14 + 7 + ? = 30 | |
| 104. | Number detectives: ? + 23 = 30 | |
| 105. | Number detectives: ? + 18 = 30 | |
| 106. | True or False?: 30 - 8 = 22 | |
| 107. | True or False?: 30 - 25 = 20 | |
| 108. | True or False?: 30 - 10 = 20 | |
| 109. | True or False?: 30 - 10 = 15 | |
| 110. | True or False?: 30 - 7 = 23 | |
| 111. | Number detectives: 30 - 14 = ? | |
| 112. | Count Down: 6 less than 41 | |
| 113. | Count Down: 3 less than 42 | |
| 114. | Subtract.chains 47 - 4 - 3 - 7, 28 - 8 - 2 - 5 | |
| 115. | Subtract.chains 23 - 4 - 1 - 3, 36 - 5 - 2 - 6 | |
| 116. | Subtract.chains 28 - 5 - 2 - 10, 50 - 5 - 3 - 2 | |
| 117. | Spot the difference: 60 & 40, 12 & 18, 100 & 95 | |
| 118. | Spot the difference: 100 & 30, 19 & 11, 30 & 24 | |
| 119. | Count down 52-4=? | |
| 120. | Count down 43-6=? | |
| 121. | Count down 61-5=? | |
| 122. | Count down 36-8=? | |
| 123. | Count down 72-7=? | |
| 124. | Count down 94-9=? | |
| 125. | Subtracting tens 55 - 20 = ? | |
| 126. | Subtracting tens 48 - 20 = ? | |
| 127. | Subtracting tens 72 - 30 = ? | |
| 128. | Subtracting tens 87 - 60 = ? | |
| 129. | Subtracting tens 91 - 60 = ? | |
| 130. | Drew at the shop: $1 - 50c | |
| 131. | Samantha at the shop: $1 - 10c | |
| 132. | Barbara at the shop: $1 - 30c | |
| 133. | Jenny at the shop: $1 - 40c | |
| 134. | Charlotte at the shop: $1 - 60c |