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