Using concrete objects and pictorial representations, including those involving numbers, quantities and measures
| 1. | Use the Pattern: 4+0, +10, +20 | |
| 2. | Use the Pattern: 5+0, +10, +20 | |
| 3. | Use the Pattern: 7+0, +10, +20 | |
| 4. | Use the Pattern: 6+0, +10, +20 | |
| 5. | Use the Pattern: 3+0, +10, +20 | |
| 6. | Use the Pattern: 9+0, +10, +20 | |
| 7. | Add these 3 numbers: 14 + 5 + 2 | |
| 8. | Add these 3 numbers: 11 + 4 + 5 | |
| 9. | Add these 3 numbers: 13 + 7 + 6 | |
| 10. | Use the Pattern: 5+4,15+4,25+4 | |
| 11. | Use the Pattern: 6+4,16+4,26+4 | |
| 12. | Use the Pattern: 10+2,20+2,30+2 | |
| 13. | 100 Grid: Start at 15. Add 7 | |
| 14. | 100 Grid: Start at 28. Add 8 | |
| 15. | 100 Grid: Start at 14. What is 11 more? | |
| 16. | 100 grid: 11 more than 33 | |
| 17. | 100 grid: Find 9 more than 27 | |
| 18. | The Chicken Story: seventeen + twelve | |
| 19. | Same or Different? Click all boxes with answer 20 | |
| 20. | Now Add This! 34+11, 34+12 | |
| 21. | Now Add This! 19+20, 19+24 | |
| 22. | Now Add This! 26+21, 26+31 | |
| 23. | Now Add This! 52+20, 52+17 | |
| 24. | Now Add This! 33+19, 33+21 | |
| 25. | Addition Chains | |
| 26. | Addition Chains | |
| 27. | Addition Chains | |
| 28. | Addition Chains | |
| 29. | Addition Chains | |
| 30. | Add three numbers: 14 + 7 + 3 | |
| 31. | Add three numbers: 10 + 12 + 8 | |
| 32. | Add three numbers: 20 + 10 + 20 | |
| 33. | Same or Different: Click all the boxes with the answer 26. | |
| 34. | Same or Different: Click all the boxes with the answer 28. | |
| 35. | 100 grid: Start at 73. Add 7. | |
| 36. | 100 grid: Start at 45. Add 8. | |
| 37. | 100 grid: Start at 26. Add 5. | |
| 38. | 100 grid: Start at 68. Add 4. | |
| 39. | 100 grid: Start at 52. Add 7. | |
| 40. | Beyond 20: What is 6 more than 29? | |
| 41. | Beyond 50: What is 4 more than 57? | |
| 42. | Beyond 30: What is 4 more than 38? | |
| 43. | Thinking in tens: Add 10, 19 to 19 | |
| 44. | Thinking in tens: Add 10, 11 to 14 | |
| 45. | Addition Chains: 4 + 5 + 5 + 2, 10 + 5 + 5 + 10 | |
| 46. | Addition Chains: 2 + 4 + 3 + 10, 12 + 1 + 2 + 7 | |
| 47. | Addition Chains: 4 + 5 + 6 + 8, 11 + 4 + 3+ 7 | |
| 48. | Add three numbers: 2 + 13 + 9 | |
| 49. | Add three numbers: 15 + 7 + 8 | |
| 50. | Add three numbers: 14 + 12 + 8 | |
| 51. | Add three numbers: 17 + 7 + 12 | |
| 52. | Add three numbers: 11 + 14 + 5 | |
| 53. | The 1 Family - Add 1, add 11 to 35 | |
| 54. | The 1 Family - Add 1, add 11 to 27 | |
| 55. | The 1 Family - Add 1, add 11 to 49 | |
| 56. | The 1 Family - Add 1, add 11 to 57 | |
| 57. | The 1 Family - Add 1, add 11 to 83 | |
| 58. | Same or different:19-12,2+5,3+4,33-26,16-8 | |
| 59. | Use the pattern: 8 - 4, - 3, - 2 | |
| 60. | Use the pattern: 6 - 6, - 5, - 4 | |
| 61. | 100 grid: 73-7 | |
| 62. | 100 grid: 48-9 | |
| 63. | 100 grid: 74-7 | |
| 64. | 100 grid: 82-8 | |
| 65. | 100 grid: 54-6 | |
| 66. | 100 grid: 61-5 | |
| 67. | 100 grid: 69 take away 11 | |
| 68. | 100 grid: 41 take away 6 | |
| 69. | 100 grid: 53 subtract 8 | |
| 70. | 100 grid: 32 take away 5 | |
| 71. | 100 grid: 76 take away 7 | |
| 72. | 100 grid: 54 take away 8 | |
| 73. | 100 grid: 64 take away 9 | |
| 74. | 100 grid: 84 take away 8 | |
| 75. | 100 grid: 46 take away 9 | |
| 76. | 100 grid: 23 take away 7 | |
| 77. | 100 grid: 71 take away 8 | |
| 78. | 100 grid: 34 take away 6 | |
| 79. | 100 grid: 77 take away 9 | |
| 80. | Subtract from 30: 30 - 20, 7 & 12 | |
| 81. | Subtract from 30: 30 - 15, 10 & 6 | |
| 82. | Subtract from 30: 30 - 11, 5 & 21 | |
| 83. | Subtract from 30: 30 - 8, 30 & 14 | |
| 84. | Subtract from 30: 30 - 17, 30 & 5 | |
| 85. | The 9 family: Take 9, 19 & 29 from 57 | |
| 86. | The 9 family: Take 9, 19 & 29 from 65 | |
| 87. | The 9 family: Take 9, 19 & 29 from 72 | |
| 88. | The 9 family: Take 9, 19 & 29 from 44 | |
| 89. | The 9 family: Take 9, 19 & 29 from 36 | |
| 90. | Subtract.chains 48 - 7 - 2 - 9, 35 - 4 - 3 - 8 | |
| 91. | Subtract.chains 47 - 4 - 3 - 7, 28 - 8 - 2 - 5 | |
| 92. | Subtract.chains 23 - 4 - 1 - 3, 36 - 5 - 2 - 6 | |
| 93. | Subtract.chains 28 - 5 - 2 - 10, 50 - 5 - 3 - 2 | |
| 94. | Subtraction chains 80-6-5-3, 70-4-2-5 | |
| 95. | Subtraction chains 30-9-2-5, 60-5-4-3 | |
| 96. | Subtraction chains 40-5-6-3, 50-9-2-8 | |
| 97. | Subtraction chains 90-3-5-3, 40-2-8-5 | |
| 98. | Subtraction chains 60-9-2-3, 50-3-6-10 | |
| 99. | The Chicken Story: sixty + eleven | |
| 100. | The Chicken Story: forty + thirty | |
| 101. | The Chicken Story: seventy-four - sixty-seven | |
| 102. | The Chicken Story: forty-four - thirty-four | |
| 103. | The Chicken Story: twenty-eight - twenty | |
| 104. | The Chicken Story: fifty - forty-six | |
| 105. | The Chicken Story: thirty - twenty-five | |
| 106. | The Chicken Story: thirty-seven - thirty-four | |
| 107. | The Chicken Story: twenty-four - twenty | |
| 108. | The Chicken Story: sixty + thirty | |
| 109. | The Chicken Story: seventy-nine - seventy-three | |
| 110. | The Chicken Story: fifty + twenty |