Calculating
1. | Number Detectives ? + 3 = 6 | |
2. | True or False: 3+4=7 | |
3. | True or False: 2+4=0 | |
4. | True or False: 3+1=1 | |
5. | True or False: 2+5=3 | |
6. | True or False: 1+0=1 | |
7. | Number Detectives: ? + 5 = 11 | |
8. | True or False? 3+4 = 7 | |
9. | True or False? 8+1 = 10 | |
10. | True or False? 7+2 = 9 | |
11. | True or False? 6+2 = 8 | |
12. | True or False? 2+1 = 4 | |
13. | True or False? 6+1 = 5 | |
14. | True or False? 5+4 = 8 | |
15. | True or False? 5+4 = 9 | |
16. | Number Detectives: 9 + 5 = ? | |
17. | Number Detectives: 6 + ? = 9 | |
18. | Number Detectives: ?+5 = 15 | |
19. | Addition Chain: 5 + 3 = ? + 3 = ? | |
20. | Addition Chain: 6 + 4 = ? + 5 = ? | |
21. | Addition Chain: 2 + 4 = ? + 5 = ? | |
22. | Addition Chain: 3 + 9 = ? + 1 = ? | |
23. | Addition Chain: 4 + 3 = ? + 5 = ? | |
24. | Number Detectives: 9 + ? = 15 | |
25. | Number Detectives: 8 + ? = 15 | |
26. | Use the Pattern: 4+0, +10, +20 | |
27. | Use the Pattern: 5+0, +10, +20 | |
28. | Use the Pattern: 7+0, +10, +20 | |
29. | Use the Pattern: 6+0, +10, +20 | |
30. | Use the Pattern: 3+0, +10, +20 | |
31. | Use the Pattern: 9+0, +10, +20 | |
32. | 11 + 6 = 17: So what else is true? | |
33. | Add Board: 30 + 8 | |
34. | Add Board: 20 + 4 | |
35. | Add Board: 15 + 3 | |
36. | Add Board: 50 + 6 | |
37. | Add Board: 20 + 9 | |
38. | Add Board: 21 + 6 | |
39. | Add Board: 13 + 12 | |
40. | Add Board: 20 + 20 | |
41. | Add Board: 12 + 7 | |
42. | Add Board: 13 + 6 | |
43. | True or False?: 10+7=17, 15+2=17, 17=10+7, 17+0=17 | |
44. | Number Detectives: ? + 10 = 32 | |
45. | True or False?: 6 + 12 = 19 | |
46. | True or False?: 9 + 9 = 18 | |
47. | True or False?: 9 + 11 = 20 | |
48. | True or False?: 10 + 5 = 5 + 10 | |
49. | True or False?: 12 + 5 = 17 | |
50. | True or False?: 4 + 14 = 10 + 4 | |
51. | True or False?: 11 + 4 = 15 | |
52. | True or False?: 10 + 9 = 20 | |
53. | True or False?: 17 + 2 = 9 | |
54. | True or False?: 11 + 5 = 16 | |
55. | Number Detectives: 10 + 27 = ? | |
56. | Use the Pattern: 5+4,15+4,25+4 | |
57. | Use the Pattern: 6+4,16+4,26+4 | |
58. | Use the Pattern: 10+2,20+2,30+2 | |
59. | 11+6=17: So what else is true? | |
60. | On the Board: 60+2 | |
61. | On the Board: 20+3 | |
62. | On the Board: 40+7 | |
63. | On the Board: 50+8 | |
64. | On the Board: 60+4 | |
65. | 21+5=26: So what else is true? | |
66. | 15+12=27: So what else is true? | |
67. | Double Up and Add: Double 6 plus 4 | |
68. | Double Up and Add: Double 10 plus 7 | |
69. | Double Up and Add: Double 9 plus 2 | |
70. | True or False?: 18 + 2 = 20 | |
71. | True or False?: 9 + 8 = 10 | |
72. | True or False?: 42 + 7 = 49 | |
73. | True or False?: 53 + 2 = 60 | |
74. | True or False?: 7 + 8 = 15 | |
75. | Same or Different: Click all the boxes with the answer 25. | |
76. | Same or Different: Click all the boxes with the answer 37. | |
77. | Same or Different: Click all the boxes with the answer 34. | |
78. | Same or Different: Click all the boxes with the answer 26. | |
79. | Same or Different: Click all the boxes with the answer 28. | |
80. | N/D Mysteries of 20! 17+, 11+, 15+ | |
81. | N/D Mysteries of 20! 7+, 10+, 8+ | |
82. | N/D Mysteries of 20! 6+, 9+, 3+ | |
83. | N/D Mysteries of 20! 20+, 5+, 2+ | |
84. | Use the Pattern: 4 + 9, + 10, + 11 | |
85. | Use the Pattern: 5 + 9, + 10, + 11 | |
86. | Use the Pattern: 6 + 9, + 10, + 11 | |
87. | Use the Pattern: 7 + 9, + 10, + 11 | |
88. | Use the Pattern: 8 + 9, + 10, + 11 | |
89. | Three Up!: Add 3 to 60, 20, 50 | |
90. | Two Up!!: Add 2 to 23, 15, 37 | |
91. | Two Up!!: Add 2 to 29, 80, 12 | |
92. | Two Up!!: Add 2 to 14, 24, 44 | |
93. | One Up!: Add 1 to 65, 19, 42 | |
94. | Add board 40 + 14 = * | |
95. | Add board 56 + 11 = * | |
96. | Add board 71 + 18 = * | |
97. | Add board 45 + 23 = * | |
98. | Subtraction chain 8 - 4 = 4, 4 - 2 = ? | |
99. | Subtraction chain 7 - 2 = 5, 5 - 2 = ? | |
100. | Subtraction chain 9 - 3 = 6, 6 - 2 = ? | |
101. | Subtraction chain 6 - 3 = 3, 3 - 1 = ? | |
102. | Subtraction chain 8 - 2 = 6, 6 - 1 = ? | |
103. | True or False? 12-7=6 | |
104. | True or False? 13-7=6 | |
105. | True or False? 16-9=10 | |
106. | True or False? 17-5=11 | |
107. | True or False? 15-8=7 | |
108. | True or False? 12-6=5 | |
109. | True or False? 16-4=12 | |
110. | Subtraction chain 9 - 1 = 8, 8 - 2 = ? | |
111. | Subtraction chain 8 - 3 = 5, 5 - 2 = ? | |
112. | Subtraction chain 6 - 2 = 4, 4 - 2 = ? | |
113. | Subtraction chain 7 - 3 = 4, 4 - 1 = ? | |
114. | Subtraction chain 9 - 2 = 7, 7 - 3 = ? | |
115. | Number detectives: 14 - ? = 4 | |
116. | Number detectives: 11 - ? = 5 | |
117. | Number detectives: 10 - ? = 8 | |
118. | Number detectives: 13 - ? = 5 | |
119. | Number detectives: 14 - ? = 7 | |
120. | Card games: Which is lower, 4 + 2 or 6 + 1? | |
121. | Card games: Which is lower, 7 + 3 or 5 + 4? | |
122. | Card games: Which is lower, 6 + 4 or 2 + 3? | |
123. | Card games: Which is lower, 4 + 3 or 1 + 9? | |
124. | Card games: Which is higher, 4 + 5 or 5 + 1? | |
125. | Number detectives ? -3 = 11 | |
126. | Number detectives 18 -10 = ? | |
127. | Number detectives 17 -? = 5 | |
128. | True or False? 20-10=10 | |
129. | True or False? 20-10=13 | |
130. | True or False? 20-20=0 | |
131. | True or False? 20-1=19 | |
132. | True or False? 15-5=10 | |
133. | True or False? 15-0=15 | |
134. | True or False? 15-5=11 | |
135. | True or False? 15-9=5 | |
136. | True or False? 10-5=15 | |
137. | True or False? 10-10=0 | |
138. | True or False? 10-1=9 | |
139. | True or False? 10-5=5 | |
140. | True or False? 12-6=6 | |
141. | True or False? 12-5=7 | |
142. | True or False? 12-12=0 | |
143. | True or False? 12-10=0 | |
144. | True or False? 18-9=0 | |
145. | True or False? 18-18=0 | |
146. | True or False? 18-6=10 | |
147. | True or False? 18-8=10 | |
148. | Take 10: 40 - 10 = ? | |
149. | Take 10: ? - 10 = 60 | |
150. | Subtraction chain 20 - 3 = 17, 17 - 3 = ? | |
151. | Subtraction chain 20 - 6 = 14, 14 - 5 = ? | |
152. | Subtraction chain 20 - 5 = 15, 15 - 2 = ? | |
153. | Subtraction chain 20 - 12 = ? - 6 = 2 | |
154. | Subtraction chain 20 - 9 = 11, 11 - 3 = ? | |
155. | True or False?: 29 - 7 = 23 | |
156. | True or False?: 28 - 5 = 21 | |
157. | True or False?: 24 - 2 = 20 | |
158. | True or False?: 9 - 4 = 5 | |
159. | True or False?: 17 - 2 = 15 | |
160. | True or False?: 15 - 3 = 10 | |
161. | True or False?: 8 - 5 = 2 | |
162. | True or False?: 27 - 4 = 23 | |
163. | True or False?: 25 - 5 = 20 | |
164. | Subtraction Chain - 27-20-13 | |
165. | Subtraction Chain - ?-4=21-2=19 | |
166. | Subtraction Chain - 27-4=?-6=17 | |
167. | Subtraction Chain - 28-7=21-5=? | |
168. | Subtract 8 (from 16, 15, 12) | |
169. | Subtract 6 (from 12, 11, 13) | |
170. | Subtract 5 (from 14, 11, 8) | |
171. | Subtract 7 (from 14, 16, 11) | |
172. | Subtract 4 (from 10, 12, 8) | |
173. | Choose the array with the same no. of counters: 3x2 | |
174. | Choose the array with the same no. of counters: 2x4 | |
175. | Choose the array with the same no. of counters: 3x4 | |
176. | Choose the array with the same no. of counters: 5x3 | |
177. | Count in times: 3x2 | |
178. | Count in times: 5x2 | |
179. | Count in times: 4x2 | |
180. | Count in times: 6x2 | |
181. | Count in times: 2x3 | |
182. | Count in times: 4x2 | |
183. | Count in times: 5x2 | |
184. | Count in times: 6x2 | |
185. | Count in times: 4x3 | |
186. | Count in times: 4x3 | |
187. | Count in times: 3x3 | |
188. | Count in times: 3x5 | |
189. | Build A Total - number sequence, 15 | |
190. | Build A Total - number sequence, 11 | |
191. | Card games: 6 + 4 = ?, 2 + 3 = ? | |
192. | Card games: 7 + 4 = ?, 9 + 8 = ? | |
193. | Card games: 7 + 9 = ?, 8 + 3 = ? | |
194. | Card games: 5 + 8 = ?, 7 + 9 = ? | |
195. | Card games: 9 + 9 = ?, 8 + 6 = ? | |
196. | Card games: Which is higher, 5 + 4 or 3 + 7? | |
197. | Card games: Which is higher, 3 + 5 or 4 + 8? | |
198. | Card games: Which is higher, 5 + 9 or 6 + 4? | |
199. | Card games: Which is higher, 4 + 6 or 9 + 3? | |
200. | Card games: Which is lower, 9 + 3 or 6 + 7? | |
201. | Card games: Which is lower, 2 + 6 or 4 + 2? | |
202. | Card Tricks: Red 9 + Black 6 | |
203. | Card Tricks: Red 8 + Black 7 |