VCMNA106
Explore the connection between addition and subtraction
| 1. | Changing Numbers: 48 to 47 | |
| 2. | Changing Numbers: 27 to 29 | |
| 3. | Changing Numbers: 68 to 58 | |
| 4. | Changing Numbers: 90 to 85 | |
| 5. | Changing Numbers: 66 to 76 | |
| 6. | Changing Numbers: 10 to 15 | |
| 7. | Changing Numbers: 20 to 30 | |
| 8. | Changing Numbers: 45 to 35 | |
| 9. | Changing Numbers: 90 to 100 | |
| 10. | Changing Numbers: 85 to 80 | |
| 11. | Changing Numbers: 45 to 50 | |
| 12. | Changing Numbers: 99 to 100 | |
| 13. | Changing Numbers: 24 to 14 | |
| 14. | Changing Numbers: 85 to 80 | |
| 15. | Changing Numbers: 48 to 50 | |
| 16. | Changing Numbers: 324 to 314 | |
| 17. | Changing Numbers: 562 to 662 | |
| 18. | Changing Numbers: 500 to 510 | |
| 19. | Changing Numbers: 444 to 445 | |
| 20. | Changing Numbers: 265 to 255 | |
| 21. | Changing Numbers: 300 to 299 | |
| 22. | Changing Numbers: 888 to 898 | |
| 23. | Changing Numbers: 428 to 438 | |
| 24. | Changing Numbers: 204 to 194 | |
| 25. | Changing Numbers: 402 to 412 | |
| 26. | Changing Numbers: 399 to 499 | |
| 27. | Changing Numbers - 45 to 145 | |
| 28. | Changing Numbers - 235 to 225 | |
| 29. | Changing Numbers - 990 to 890 | |
| 30. | Changing Numbers - 576 to 577 | |
| 31. | Changing Numbers - 36 to 136 | |
| 32. | Changing Numbers - 455 to 555 | |
| 33. | Make 20: 7+4+? | |
| 34. | Make 20: 11+5+? | |
| 35. | Make 20: 8+9+? | |
| 36. | Number Detectives: 10 + ? = 34 | |
| 37. | Make 50: 20+10+? | |
| 38. | Number detectives: Mysteries of 15 | |
| 39. | Number detectives: Mysteries of 16 | |
| 40. | Number detectives: Mysteries of 17 | |
| 41. | Number detectives: Mysteries of 14 | |
| 42. | Addition Chains | |
| 43. | Addition Chains | |
| 44. | Addition Chains | |
| 45. | Addition Chains | |
| 46. | Addition Chains | |
| 47. | Make 30: 10 + 11 + ? = 30 | |
| 48. | Make 30: 19 + 2 + ? = 30 | |
| 49. | Make 30: 20 + 10 + ? = 30 | |
| 50. | Make 30: 16 + 4 + ? = 30 | |
| 51. | Make 30: 20 + 7 + ? = 30 | |
| 52. | Make 30: 18 + 3 + ? = 30 | |
| 53. | Changing numbers: 24 changes to 33 | |
| 54. | Changing numbers: 19 changes to 28 | |
| 55. | Changing numbers: 13 changes to 21 | |
| 56. | Changing numbers: 9 changes to 17 | |
| 57. | Changing numbers: 8 changes to 17 | |
| 58. | Number Detectives: ? + 7 = 30 | |
| 59. | Number Detectives: ? + 24 = 30 | |
| 60. | Number Detectives: 22 + ? = 30 | |
| 61. | Number Detectives: 21 + ? = 30 | |
| 62. | Make 50: 40 + 4 + ? | |
| 63. | Make 36: 20 + 14 + ? | |
| 64. | Make 39: 30 + 6 + ? | |
| 65. | Make 37: 12 + 20 + 5 | |
| 66. | Make 34: 10 + 22 + ? | |
| 67. | Number detectives: 30+?, 50+?, 60+? =100 | |
| 68. | Addition Chains: 10 + 4 + 6 + 2, 11 + 2 + 3 + 4 | |
| 69. | Addition Chains: 4 + 5 + 6 + 8, 11 + 4 + 3+ 7 | |
| 70. | Addition Chains: 3 + 2 + 4 + 8, 4 + 3 + 7 + 4 | |
| 71. | Number detectives: ? + 9 = 49 | |
| 72. | Number detectives: ? + 11 = 53 | |
| 73. | Number detectives: 35+? = 46 | |
| 74. | Make 50: 39+7+? = 50 | |
| 75. | Make 50: 39+5+? = 50 | |
| 76. | Make 50: 35+5+? = 50 | |
| 77. | Make 50: 38+10+? = 50 | |
| 78. | Make 50: 42+6+? = 50 | |
| 79. | N/D Mysteries of 40! 34+? 30+? 38+?=40 | |
| 80. | N/D Mysteries of 40! 31+? 36+? 30+?=40 | |
| 81. | N/D Mysteries of 40! 33+? 37+? 32+?=40 | |
| 82. | N/D Mysteries of 40! 32+? 39+? 34+?=40 | |
| 83. | N/D Mysteries of 40! 31+? 35+? 37+?=40 | |
| 84. | 36 + 12 = 48 So what else is true? | |
| 85. | Add board 5* + 46 = *8 | |
| 86. | Add board 35 + *3 = 7* | |
| 87. | Number detectives: ? - 5 = 10 | |
| 88. | Number detectives: ? - 7 = 6 | |
| 89. | Number detectives: ? - 8 = 4 | |
| 90. | Write the missing number: 15 + 1 + ? = 20 | |
| 91. | Write the missing number: ? + 11 + 2 = 20 | |
| 92. | Write the missing number: 3 + 4 + ? = 20 | |
| 93. | Write the missing number: ? + 5 + 6 = 20 | |
| 94. | Write the missing number: 5 + 8 + ? = 20 | |
| 95. | Write the missing number: 4 + 8 + ? = 20 | |
| 96. | Write the missing number: 11 + ? + 2 = 20 | |
| 97. | Write the missing number: ? + 13 + 4 = 20 | |
| 98. | Write the missing number: 6 + 9 + ? = 20 | |
| 99. | Write the missing number: 4 + ? + 6 = 20 | |
| 100. | Subtraction chain 20 - 12 = ? - 6 = 2 | |
| 101. | Takeaway board: 17-?=11 | |
| 102. | Takeaway board: 15-?=11 | |
| 103. | Takeaway board: 18-? = 12 | |
| 104. | Takeaway board: 16-? = 13 | |
| 105. | Takeaway board: 19-? = 14 | |
| 106. | Put in the missing number: 5 + 4 + ? = 16 | |
| 107. | Put in the missing number: 11 + ? + 6 = 25 | |
| 108. | Write in the missing number: ? + 13 + 5 = 21 | |
| 109. | Put in the missing number: 9 + 2 + ? = 19 | |
| 110. | Put in the missing number: ? + 10 + 14 = 28 | |
| 111. | Subtraction Chain - 22-4=?-3=15 | |
| 112. | Subtraction Chain - ?-8=16-2=14 | |
| 113. | Subtraction Chain - 21-4 =?-1= 16 | |
| 114. | Subtraction Chain - ?-4=19-3=16 | |
| 115. | Mysteries of Fifty: 50-?=42, 50-?=45 | |
| 116. | Mysteries of Fifty: 50-?=48, 50-?=43 | |
| 117. | Mysteries of Fifty: 50-?=44, 50-?=47 | |
| 118. | Mysteries of Forty: 40-?=36, 40-?=31 | |
| 119. | Mysteries of Forty: 40-?=33, 40-?=39 | |
| 120. | Mysteries of Forty: 40-?=35, 40-?=38 | |
| 121. | Mysteries of Thirty: 30-?=29, 30-?=24 | |
| 122. | Mysteries of Thirty: 30-?=21, 30-?=27 | |
| 123. | Mysteries of Thirty: 30-?=26, 30-?=22 | |
| 124. | Spot the difference between 30 and 15. | |
| 125. | Spot the difference between 12 and 25. | |
| 126. | Spot the difference between 30 and 10. | |
| 127. | Spot the difference between 40 and 10. | |
| 128. | Spot the difference between 20 and 39. | |
| 129. | Spot the difference between 18 and 25. | |
| 130. | Spot the difference between 25 and 34. | |
| 131. | Spot the difference between 19 and 31. | |
| 132. | Spot the difference between 19 and 42. | |
| 133. | Spot the difference between 36 and 15. | |
| 134. | Same Difference - Difference between 10 and 40. | |
| 135. | Write the missing number: 20 + 3 + ? = 30 | |
| 136. | Write the missing number: 12 + ? + 10 = 30 | |
| 137. | Write the missing number: 15 + ? + 5 = 30 | |
| 138. | Write the missing number: 9 + ? + 12 = 30 | |
| 139. | Write the missing number: ? + 5 + 4 = 30 | |
| 140. | Write the missing number: 15 + ? + 6 = 30 | |
| 141. | Write the missing number: 18 + ? + 2 = 30 | |
| 142. | Write the missing number: 20 + 3 + ? = 30 | |
| 143. | Write the missing number: ? + 13 + 5 = 30 | |
| 144. | Write the missing number: 14 + 7 + ? = 30 | |
| 145. | Number detectives: ? + 23 = 30 | |
| 146. | Number detectives: ? + 18 = 30 | |
| 147. | Number detectives: 30 - ? = 15 | |
| 148. | Number detectives: 30 - ? = 13 | |
| 149. | Subtract.chains 48 - 7 - 2 - 9, 35 - 4 - 3 - 8 | |
| 150. | Subtract.chains 47 - 4 - 3 - 7, 28 - 8 - 2 - 5 | |
| 151. | Subtract.chains 23 - 4 - 1 - 3, 36 - 5 - 2 - 6 | |
| 152. | Subtract.chains 28 - 5 - 2 - 10, 50 - 5 - 3 - 2 | |
| 153. | Spot the difference: 60 & 40, 12 & 18, 100 & 95 | |
| 154. | Spot the difference: 20 & 14, 17 & 9, 80 & 73 | |
| 155. | Spot the difference: 100 & 30, 19 & 11, 30 & 24 | |
| 156. | Spot the difference: 50 & 41, 100 & 92, 101 & 98 | |
| 157. | Subtraction chains 80-6-5-3, 70-4-2-5 | |
| 158. | Subtraction chains 30-9-2-5, 60-5-4-3 | |
| 159. | Subtraction chains 40-5-6-3, 50-9-2-8 | |
| 160. | Subtraction chains 90-3-5-3, 40-2-8-5 | |
| 161. | Subtraction chains 60-9-2-3, 50-3-6-10 | |
| 162. | Build A Total - number sequence, 24 | |
| 163. | Build A Total - number sequence, 11 | |
| 164. | Number Quest - find 1 number to complete 2 number sentences | |
| 165. | Sign Scramble - complete 2 number sentences using given numbers | |
| 166. | Build a Total - number sequence, 15 | |
| 167. | Number Quest - find 1 number to complete 2 number sentences | |
| 168. | Number Quest - find 1 number to complete 2 number sentences | |
| 169. | 16 go to WaterWorld: 5+4+3+? | |
| 170. | 17 go to Waterworld: 6+5+2+? | |
| 171. | 14 go to Waterworld: 6+3+2+? | |
| 172. | 18 go to WaterWorld: 3+3+2+? | |
| 173. | 15 go to WaterWorld: 5+3+2+? | |
| 174. | 16 go to Waterworld? 2+3+3+? | |
| 175. | 19 go to Waterworld: 5+4+3+? | |
| 176. | Make 50: 32+8+? = 50 |