Calculating

1. True or False? 2+8 = 8+2
2. Number Detectives: 10 + ? = 34
3. True or False?: 21 + 4 = 25
4. True or False?: 23 + 2 = 27
5. True or False?: 26 + 3 = 29
6. True or False?: 24 + 4 = 25
7. True or False?: 22 + 6 = 28
8. Same or different? Click all boxes with answer 18
9. Same or Different? Click all boxes with answer 20
10. Same or Different? Click all boxes with answer 16
11. Add Board: 60 + 23
12. Add Board: 30 + 70
13. Add Board: 40 + 60
14. Add Board: 63 + 20
15. Adding tens: 26 + ? = 36
16. Adding tens: 46 + ? = 56
17. Adding tens: 64 + ? = 94
18. Adding tens: 42 + 10 = ?
19. Adding tens: 38 + 20 = ?
20. Adding tens: 56 + 30 = ?
21. Number detectives: Mysteries of 15
22. Number detectives: Mysteries of 16
23. Number detectives: Mysteries of 13
24. Number detectives: Mysteries of 17
25. Number detectives: Mysteries of 14
26. Addition Chains
27. Addition Chains
28. Addition Chains
29. Addition Chains
30. Addition Chains
31. On the board 13 + 15 = ?
32. On the board 12 + 13 = ?
33. On the board 14 + 12 = ?
34. On the board 18 + 11 = ?
35. On the board 15 + 14 = ?
36. On the board 963 + 5 = ?
37. On the board 242 + 6 = ?
38. On the board 781 + 8 = ?
39. On the board 427 + 2 = ?
40. On the board 113 + 4 = ?
41. Number Detectives: ? + 7 = 30
42. Number Detectives: ? + 24 = 30
43. True or False?: 17 + 4 = 20
44. True or False?: 8 + 8 = 16
45. True or False?: 9 + 8 = 16
46. True or False?: 15 + 5 = 20
47. True or False?: 5 + 6 = 12
48. True or False?: 16 + 3 = 18
49. True or False?: 7 + 9 = 16
50. True or False?: 13 + 1 = 1 + 13
51. True or False?: 16 + 4 = 20
52. True or False?: 9 + 7 = 17
53. Number Detectives: 10 + 20 = ?
54. Number Detectives: 24 + 6 = ?
55. Number Detectives: 5 + 25 = ?
56. Number Detectives: 22 + ? = 30
57. Number Detectives: 21 + ? = 30
58. On The Board 135+100
59. Number detectives: 30+?, 50+?, 60+? =100
60. Addition Chains: 10 + 4 + 6 + 2, 11 + 2 + 3 + 4
61. Addition Chains: 4 + 5 + 5 + 2, 10 + 5 + 5 + 10
62. Addition Chains: 2 + 4 + 3 + 10, 12 + 1 + 2 + 7
63. Addition Chains: 4 + 5 + 6 + 8, 11 + 4 + 3+ 7
64. Addition Chains: 3 + 2 + 4 + 2, 7 + 2 + 3 + 4
65. Addition Chains: 3 + 2 + 4 + 8, 4 + 3 + 7 + 4
66. Number detectives: ? + 9 = 49
67. Number detectives: ? + 11 = 53
68. True or False: 7+8=12
69. True or False: 17+2=20
70. True or False: 10+9=19
71. True or False: 22+4=23
72. True or False: 9+6=15
73. True or False: 12+14=26
74. True or False: 12+12=24
75. True or False: 13+14=28
76. True or False: 15+12=27
77. True or False: 16+11=25
78. Number detectives: 22+9 = ?
79. Number detectives: 51+11 = ?
80. Number detectives: 35+? = 46
81. Same or Different: Click all the boxes with the answer 50.
82. Same or Different: Click all the boxes with the answer 46.
83. Same or Different: Click all the boxes with the answer 32.
84. Same or Different: Click all the boxes with the answer 45.
85. Same or Different: Click all the boxes with the answer 38.
86. Add Board: 24 + 15 = ?
87. Add Board: 45 + 34 = ?
88. Add Board: 67 + 12 = ?
89. Add Board: 32 + 65 = ?
90. Add Board: 25 + 13 = ?
91. N/D Mysteries of 40! 34+? 30+? 38+?=40
92. N/D Mysteries of 40! 31+? 36+? 30+?=40
93. N/D Mysteries of 40! 33+? 37+? 32+?=40
94. N/D Mysteries of 40! 32+? 39+? 34+?=40
95. N/D Mysteries of 40! 31+? 35+? 37+?=40
96. 100 Zone: 95+7=? 101-?=99 ?+6=103
97. 100 Zone: 95+6=? 103-?=99 ?+6=104
98. 100 Zone: 98+7=? 105-?=98 ?+6=105
99. 100 Zone: 98+6=? 102-?=98 ?+5=103
100. 100 Zone: 98+3=? 101-?=97 ?+5=102
101. 36 + 12 = 48 So what else is true?
102. Number detectives *+109 = 113
103. Number detectives *+4 = 103
104. Number detectives *+5 = 103
105. Number detectives 95+*=101
106. Number detectives 97+*=103
107. Use The Pattern 3+5 30+50 300+500
108. Use The Pattern 3+6 30+60 600+300
109. Use The Pattern 2+4 20+40 200+400
110. Use The Pattern 3+2 30+20 200+300
111. Use The Pattern 6+2 60+20 600+200
112. Add board 5* + 46 = *8
113. Add board 35 + *3 = 7*
114. Addition Chains 21 + 3 + 6 + 5, 60 + 4 + 3 + 2
115. Addition Chains 33 + 4 + 10 + 5, 28 + 3 + 9 + 8
116. Addition Chains 23 + 5 + 4 + 9, 60 + 8 + 3 + 10
117. Addition Chains 95 + 4 + 2 + 12, 94 + 3 + 3 + 7
118. Addition Chains 100 + 5 + 5 + 7, 99 + 3 + 6 + 2
119. Same or different:19-12,2+5,3+4,33-26,16-8
120. Number detectives: 60+?, 50+?, 75+?=100
121. Number detectives: ? - 5 = 10
122. Number detectives: ? - 6 = 3
123. Number detectives: ? - 7 = 2
124. Number detectives: ? - 7 = 6
125. Number detectives: ? - 8 = 4
126. True or False? 10-5=20-5
127. Number detectives: 14 - 6 = ?
128. Number detectives: 15 - 9 = ?
129. Number detectives: 11 - 8 = ?
130. Number detectives: 13 - 5 = ?
131. Number detectives: 15 - 13 = ?
132. Takeaway board: 17-?=11
133. Takeaway board: 15-?=11
134. Takeaway board: 18-? = 12
135. Takeaway board: 16-? = 13
136. Takeaway board: 19-? = 14
137. Taking tens: 40 - 30 = ?
138. Taking tens: 50 - 20 = ?
139. Taking tens: 80 - 40 = ?
140. Taking tens: 70 - 10 = ?
141. Taking tens: 70 - 40 = ?
142. Taking tens: 40 - 30 = ?
143. 12 + 7 = 19 - so what else is true?
144. True or False?: 12 - 6 = 6
145. Subtraction Chain - 22-4=?-3=15
146. Subtraction Chain - ?-8=16-2=14
147. Subtraction Chain - 21-4 =?-1= 16
148. Subtraction Chain - 29-8=21-3=?
149. Subtraction Chain - 26-5=21-4=?
150. Subtraction Chain - ?-4=19-3=16
151. Use the pattern: 10, 20 & 80 - 5 = ?
152. Use the pattern: 10, 20 & 40 - 3 = ?
153. Use the pattern: 10, 20 & 90 - 7 = ?
154. Use the pattern: 10, 20 & 50 - 4 = ?
155. Use the pattern: 10, 20 & 30 - 8 = ?
156. Taking ten: 46-10
157. Taking ten: 72-10
158. Taking ten: 39-10
159. Taking ten: 55-10
160. Taking ten: 81-10
161. Mysteries of Fifty: 50-?=42, 50-?=45
162. Mysteries of Fifty: 50-?=48, 50-?=43
163. Mysteries of Fifty: 50-?=44, 50-?=47
164. Mysteries of Forty: 40-?=36, 40-?=31
165. Mysteries of Forty: 40-?=33, 40-?=39
166. Mysteries of Forty: 40-?=35, 40-?=38
167. Mysteries of Thirty: 30-?=29, 30-?=24
168. Mysteries of Thirty: 30-?=21, 30-?=27
169. Mysteries of Thirty: 30-?=26, 30-?=22
170. True or False?: 16 - 8 = 8
171. True or False?: 23 - 5 = 18
172. True or False?: 21 - 16 = 4
173. True or False?: 18 - 9 = 8
174. True or False?: 19 - 6 = 12
175. True or False?: 24 - 15 = 8
176. True or False?: 16 - 9 = 7
177. True or False?: 22 - 10 = 11
178. True or False?: 19 - 13 = 6
179. True or False?: 26 - 13 = 13
180. Use the pattern 16-4=? 26-3=?, 36-4=?
181. Use the pattern 14-3=? 24-3=?, 34-3=?
182. Use the pattern 15-3=? 25-3=?, 35-3=?
183. Use the pattern 18-5=? 28-5=?, 38-5=?
184. Use the pattern 16-7=? 26-7=?, 36-7=?
185. Use the pattern 13-6=? 23-6=?, 33-6=?
186. Use the pattern 11-5=? 21-5=?, 31-5=?
187. Use the pattern 12-9=? 22-9=?, 32-9=?
188. Use the pattern 19-4=? 29-4=?, 39-4=?
189. Use the pattern 17-8=? 27-8=?, 37-8=?
190. Takeaway board 87-53
191. Takeaway board 29-15
192. Takeaway board 45-21
193. Takeaway board 77-34
194. Takeaway board 18-12
195. Subtract 8 from 17, 13 & 11
196. Subtract 6 from 13, 15 & 11
197. Subtract 7 from 24, 22 & 25
198. Subtract 5 from 21, 20 & 24
199. Subtract 9 from 12, 15 & 17
200. Number detectives: ? + 23 = 30
201. Number detectives: ? + 18 = 30
202. True or False?: 30 - 8 = 22
203. True or False?: 30 - 25 = 20
204. True or False?: 30 - 10 = 20
205. True or False?: 30 - 10 = 15
206. True or False?: 30 - 7 = 23
207. Number detectives: 30 - 14 = ?
208. Number detectives: 30 - ? = 15
209. Number detectives: 30 - ? = 13
210. Use the pattern: 9-5, 90-50, 900-500
211. Use the pattern: 8-5, 80-50, 800-500
212. Use the pattern: 6-2, 60-20, 600-200
213. Takeaway board: 65-34
214. Takeaway board: 48-26
215. Taking Tens: 44 - 20
216. Taking Tens: 68 - 30
217. Taking Tens: 98 - 50
218. Taking Tens: 32 - 20
219. Taking Tens: 59 - 40
220. Taking Tens: 87 - 20
221. Taking Tens: 72 - 40
222. Subtract.chains 48 - 7 - 2 - 9, 35 - 4 - 3 - 8
223. Subtract.chains 47 - 4 - 3 - 7, 28 - 8 - 2 - 5
224. Subtract.chains 23 - 4 - 1 - 3, 36 - 5 - 2 - 6
225. Subtract.chains 32 - 4 - 7 - 4, 45 - 2 - 10 - 5
226. Subtract.chains 28 - 5 - 2 - 10, 50 - 5 - 3 - 2
227. Number Detectives: ? - 15 = 10
228. Number Detectives: ? - 9 = 21
229. Number Detectives: 30 - 17 = ?
230. Number Detectives: 30 - 14 = ?
231. Number Detectives: 30 - ? = 12
232. Number Detectives: 40 - ? = 29
233. Take Ten 42 - 10
234. Subtraction chains 80-6-5-3, 70-4-2-5
235. Subtraction chains 30-9-2-5, 60-5-4-3
236. Subtraction chains 40-5-6-3, 50-9-2-8
237. Subtraction chains 90-3-5-3, 40-2-8-5
238. Subtraction chains 60-9-2-3, 50-3-6-10
239. Subtracting tens: 88 - ? = 48
240. Subtracting tens: 57 - ? = 27
241. Subtracting tens: 44 - ? = 24
242. Subtracting tens 55 - 20 = ?
243. Subtracting tens 48 - 20 = ?
244. Subtracting tens 72 - 30 = ?
245. Subtracting tens 87 - 60 = ?
246. Subtracting tens 91 - 60 = ?
247. The Mysteries of 40!: 40-?=31, 40-?=33, 40-?=30
248. The Mysteries of 40!: 40-?=51, 40-?=38, 40-?=32
249. The Mysteries of 40!: 40-?=29, 40-?=31, 40-?=33
250. The Mysteries of 40!: 40-?=28, 40-?=32, 40-?=18
251. Tropical fruit feast 2x3
252. Tropical fruit feast 2x2
253. Tropical fruit feast 4x2
254. Tropical fruit feast: 4 x $5
255. Word Wise! 3 groups of 3
256. Word Wise! 3 groups of 5
257. Word Wise! 2 groups of 6
258. Word Wise! 4 groups of 4
259. Double up: 2 x 3
260. Double up: 2 x 5
261. Double up: 2 x 6
262. Double up: 2 x 4
263. Double up: 2 x 7
264. Double up: Double 2
265. Double up: Double 8
266. Double up: Double 10
267. Double up: Double 6
268. Double up: Double 4
269. One potato, two potato....: 1 kilogram = $2 so 5 kgs = $?
270. Times change: Click all statements correctly describing the array
271. Times change: Click all statements correctly describing the array
272. Times change: Click all statements correctly describing the array
273. Times change: Click all statements correctly describing the array
274. Times change: Click all statements correctly describing the array
275. Tropical fruit feast: 4x$3
276. Tropical fruit feast: 10x$5
277. Double up: Double 15, 150
278. Double up: Double 35, 350
279. Double up: Double 16, 160
280. Double Up: Double 25, 250
281. Double Up: Double 9, 900
282. Tropical Fruit Feast - $4 = 2x?
283. Tropical Fruit Feast - $3 = 3x?
284. Tropical Fruit Feast - $9 = 3x?
285. Tropical Fruit Feast - $10 = 5x?
286. Tropical Fruit Feast - $8 = 4x?
287. Build A Total - number sequence, 24
288. Enid the Elephant's Equations - equivalent to 8 + 4
289. Enid the Elephant's Equations - equivalent to 6 + 5
290. Enid the Elephant's Equations - equivalent to 7 + 7
291. Number Quest - find 1 number to complete 2 number sentences
292. Sign Scramble - complete 2 number sentences using given numbers
293. Number Quest - complete number sentence
294. Build a Total - number sequence, 15
295. Number Quest - find 1 number to complete 2 number sentences
296. Number Quest - find 1 number to complete 2 number sentences
297. Tropical fruit feast: 2 x $4
298. Tropical fruit feast: 2 x $2