Step 3
Difficulty 3
| 1. | Add these 3 numbers: 9+10+4 | |
| 2. | Add it up: 69+23 | |
| 3. | Add it up: 46+26 | |
| 4. | Add it up: 37+24 | |
| 5. | Add it up: 28+25 | |
| 6. | Changing Numbers 29 to 34 | |
| 7. | Changing Numbers 67 to 78 | |
| 8. | Changing Numbers 98 to 101 | |
| 9. | Changing Numbers 87 to 92 | |
| 10. | Changing Numbers 59 to 63 | |
| 11. | Changing Numbers 96 to 101 | |
| 12. | Add It Up: Addition with regrouping 246+8 | |
| 13. | Add It Up: Addition with regrouping 289+4 | |
| 14. | Add It Up: Addition with regrouping 545+8 | |
| 15. | Add It Up: Addition with regrouping 637+5 | |
| 16. | Add It Up: Addition with regrouping 124+7 | |
| 17. | Changing numbers: 12 + 10, +11, +111 | |
| 18. | Changing numbers: 28 + 10, +11, +111 | |
| 19. | Changing numbers: 49 + 10, +11, +111 | |
| 20. | Changing numbers: 88 + 10, +11, +111 | |
| 21. | Changing numbers: 29 + 10, +11, +111 | |
| 22. | Use the pattern: 4+9, 40+90, 400+900 | |
| 23. | Use the pattern: 1+7, 10+70, 100+700 | |
| 24. | On the Board *8 + 51 = 7* | |
| 25. | Double up & add: Double 9, + 3, + 10 | |
| 26. | Double up & add: Double 10, + 6, + 10 | |
| 27. | Adding Tens: 416 + 50 = * | |
| 28. | Adding Tens: 542 + 50 = * | |
| 29. | Add Hundreds: 100+280 | |
| 30. | Add Hundreds: 200+43 | |
| 31. | Adding Tens: * + 726 = 786 | |
| 32. | Adding Tens: * + 314 = 394 | |
| 33. | Number Detectives: 100 Pairs 85 + ?, 75 + ?, 45 +?= 100 | |
| 34. | The Nine Family: 53 + 9, + 19 + 29 | |
| 35. | The Nine Family: 47 + 9, + 19 + 29 | |
| 36. | The Nine Family: 38 + 9, + 19 + 29 | |
| 37. | The Nine Family: 55 + 9, + 19, + 29 | |
| 38. | The Nine Family: 42 + 9, + 19, + 29 | |
| 39. | Anyone for a burger?: $5+$6+$4 | |
| 40. | Anyone for a burger?: $5+$6+$1+$3 | |
| 41. | Add It Up: Addition with regrouping 45 + 17 | |
| 42. | Add It Up: Addition with regrouping 63 + 28 | |
| 43. | Add It Up: Addition with regrouping 34 + 48 | |
| 44. | Add It Up: Addition with regrouping 29 + 52 | |
| 45. | Add It Up: Addition with regrouping 46 + 37 | |
| 46. | Add It Up: Addition with regrouping 968+ 5 | |
| 47. | Add It Up: Addition with regrouping 457+7 | |
| 48. | Add It Up: Addition with regrouping 213+9 | |
| 49. | Add It Up: Addition with regrouping 518+6 | |
| 50. | Add It Up: Addition with regrouping 812+ 8 | |
| 51. | True or False?: 12 + 14 = 26 | |
| 52. | True or False?: 19 + 13 = 34 | |
| 53. | True or False?: 17 + 19 = 36 | |
| 54. | True or False?: 14 + 17 = 33 | |
| 55. | True or False?: 12 + 13 = 25 | |
| 56. | Use the pattern: 5+2,50+20, 500+200=? | |
| 57. | Use the pattern: 5+4,50+40, 500+400=? | |
| 58. | Use the pattern: 7+1,70+10, 700+100=? | |
| 59. | Use the pattern: 2+3,20+30, 200+300=? | |
| 60. | Use the pattern: 3+8,30+80, 300+800=? | |
| 61. | Make 100: 50, 20 & ? | |
| 62. | Make 100: 60, 20 & ? | |
| 63. | Make 100: 10, 40 & ? | |
| 64. | Make 100: 10, 30 & ? | |
| 65. | Make 100: 60, 40 & ? | |
| 66. | Take it away: Subtraction with decomposition 45-8 | |
| 67. | Take it away: Subtraction with decomposition 43-7 | |
| 68. | Take it away: Subtraction with decomposition 62-8 | |
| 69. | Takeaway board: 3? - 14 = 23 | |
| 70. | Takeaway board: 2? - 13 = 13 | |
| 71. | Takeaway board: 4? - 22 = 27 | |
| 72. | Takeaway board: 5? - 26 = 32 | |
| 73. | Take it away: Subtraction with decomposition 24 - 18 | |
| 74. | Takeaway board 152-? = 144 | |
| 75. | Takeaway board 547-? = 538 | |
| 76. | Takeaway board 553-? = 546 | |
| 77. | Takeaway board 291-? 285 | |
| 78. | Takeaway board 742-? = 737 | |
| 79. | Eleven family: Subtract 1, 11 & 41 from 85 | |
| 80. | Eleven family: Subtract 1, 11 & 21 from 68 | |
| 81. | Write the missing number: 25 + 5 + ? = 35 | |
| 82. | Write the missing number: 25 + 1 + ? = 35 | |
| 83. | Write the missing number: 35 + 5 + ? = 50 | |
| 84. | Write the missing number: 35 + 7 + ? = 50 | |
| 85. | True or False: 100 - 47 = 33 | |
| 86. | Use the Pattern: 7-3, 37-3, 167-3=? | |
| 87. | Use the Pattern: 9-5, 29-5, 249-5=? | |
| 88. | Use the Pattern: 6-3, 36-3, 166-3=? | |
| 89. | Use the Pattern: 8-1, 18-1, 128-1=? | |
| 90. | Use the Pattern: 6-4, 46-4, 286-4=? | |
| 91. | Hundreds takeaway 350-**=330 | |
| 92. | Hundreds takeaway 875-**=865 | |
| 93. | The Mysteries of 40!: 40-?=32, 40-?=29, 40-?=37 | |
| 94. | The Mysteries of 40!: 40-?=29, 40-?=38, 40-?=39 | |
| 95. | The Mysteries of 40!: 40-?=30, 40-?=33, 40-?=36 | |
| 96. | Subtraction chains: 30-4-10-8, 30-5-10-7 | |
| 97. | Subtraction chains: 30-4-16-8, 30-5-3-11 | |
| 98. | Subtraction chains: 30-8-6-12, 30-6-3-5 | |
| 99. | Subtraction chains: 30-3-4-13, 30-6-5-7 | |
| 100. | Subtraction chains: 30-10-9-4, 30-5-9-7 | |
| 101. | Take it away: Subtraction with decomposition 53 - 28 | |
| 102. | Take it away: Subtraction with decomposition 61 - 13 | |
| 103. | Take it away: Subtraction with decomposition 25 - 16 | |
| 104. | Take it away: Subtraction with decomposition 33 - 18 | |
| 105. | Take it away: Subtraction with decomposition 46 - 27 | |
| 106. | Same or Different: Answer 43 | |
| 107. | Same or Different: Answer 77 | |
| 108. | Same or Different: Answer 69 | |
| 109. | The Mysteries of 40! 40-14,23,19 | |
| 110. | The Mysteries of 40! 40-8,12,25 | |
| 111. | The Mysteries of 40! 40-20,15,9 | |
| 112. | The Chicken Story: thirty-six + fourteen | |
| 113. | The Chicken Story: thirteen + nineteen | |
| 114. | The Chicken Story: twenty-four + thirty-two | |
| 115. | Jenni at the shop: $1 - (10c + 30c + 5c) | |
| 116. | Liz at the shop: $1 - (10c + 40c + 5c) |