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 |