Use simple additive strategies with whole numbers and fractions
Use simple additive strategies with whole numbers and fractions
| 1. | Changing Numbers: 27 to 29 | |
| 2. | Changing Numbers: 90 to 85 | |
| 3. | 5 less, 5 more than 80 | |
| 4. | 5 less, 5 more than 30 | |
| 5. | Changing Numbers: 85 to 80 | |
| 6. | Changing Numbers: 45 to 50 | |
| 7. | Changing Numbers: 85 to 80 | |
| 8. | Changing Numbers: 48 to 50 | |
| 9. | Back to School: 5c + 15c + 7 c | |
| 10. | Make 20: 7+4+? | |
| 11. | Make 20: 11+5+? | |
| 12. | Make 20: 8+9+? | |
| 13. | Add these 3 numbers: 14 + 5 + 2 | |
| 14. | Add these 3 numbers: 11 + 4 + 5 | |
| 15. | Add these 3 numbers: 9+10+4 | |
| 16. | Add these 3 numbers: 13 + 7 + 6 | |
| 17. | Number Detectives: 10 + ? = 34 | |
| 18. | 100 Grid: Start at 15. Add 7 | |
| 19. | 100 Grid: Start at 28. Add 8 | |
| 20. | 100 Grid: Start at 14. What is 11 more? | |
| 21. | 100 grid: 11 more than 33 | |
| 22. | 100 grid: Find 9 more than 27 | |
| 23. | True or False?: 21 + 4 = 25 | |
| 24. | True or False?: 26 + 3 = 29 | |
| 25. | True or False?: 22 + 6 = 28 | |
| 26. | Make 50: 20+10+? | |
| 27. | Make 50: 20+10+? | |
| 28. | Make 50: 20+10+? | |
| 29. | Make 50: 20+10+? | |
| 30. | Make 50: 20+10+? | |
| 31. | Adding tens: 26 + ? = 36 | |
| 32. | Adding tens: 46 + ? = 56 | |
| 33. | Adding tens: 64 + ? = 94 | |
| 34. | Adding tens: 38 + 20 = ? | |
| 35. | Adding tens: 56 + 30 = ? | |
| 36. | Adding tens: ?+ 36 = 66 | |
| 37. | Adding tens: ?+ 73 = 83 | |
| 38. | Adding tens: ?+ 46 = 86 | |
| 39. | Now Add This! 34+11, 34+12 | |
| 40. | Now Add This! 19+20, 19+24 | |
| 41. | Now Add This! 26+21, 26+31 | |
| 42. | Now Add This! 52+20, 52+17 | |
| 43. | Now Add This! 33+19, 33+21 | |
| 44. | Addition Chains | |
| 45. | Changing numbers 136 to 140 | |
| 46. | Changing numbers 122 to 130 | |
| 47. | Changing numbers 154 to 160 | |
| 48. | Changing numbers 188 to 190 | |
| 49. | Changing numbers 177 to 180 | |
| 50. | Add three numbers: 4 + 8 + 7 | |
| 51. | Add three numbers: 6 + 7 + 9 | |
| 52. | Add three numbers: 14 + 7 + 3 | |
| 53. | Add three numbers: 10 + 12 + 8 | |
| 54. | Add three numbers: 13 + 9 + 7 | |
| 55. | Add three numbers: 20 + 10 + 20 | |
| 56. | 40s zone: Add on 5 to 36. | |
| 57. | 40s zone: 4 more than 38 | |
| 58. | 40s zone: 37 plus 5 | |
| 59. | 40s zone: 4 more than 39 | |
| 60. | 40s zone: Add on 3 to 38 | |
| 61. | 50s zone: Add on 5 to 47. | |
| 62. | 50s zone: 49 plus 3 | |
| 63. | 50s zone: 48 plus 5 | |
| 64. | 50s zone: 4 more than 47 | |
| 65. | 50s zone: 5 more than 46 | |
| 66. | Bob's and Kai-ling's teams $16 + $7 = $? | |
| 67. | True or False?: 42 + 7 = 49 | |
| 68. | Same or Different: Click all the boxes with the answer 25. | |
| 69. | Same or Different: Click all the boxes with the answer 37. | |
| 70. | Same or Different: Click all the boxes with the answer 34. | |
| 71. | Same or Different: Click all the boxes with the answer 26. | |
| 72. | Same or Different: Click all the boxes with the answer 28. | |
| 73. | Make 30: 10 + 11 + ? = 30 | |
| 74. | Make 50: 20+10+? | |
| 75. | Make 30: 19 + 2 + ? = 30 | |
| 76. | Make 30: 20 + 10 + ? = 30 | |
| 77. | Make 30: 16 + 4 + ? = 30 | |
| 78. | Make 30: 20 + 7 + ? = 30 | |
| 79. | Make 30: 18 + 3 + ? = 30 | |
| 80. | 100 grid: Start at 73. Add 7. | |
| 81. | 100 grid: Start at 45. Add 8. | |
| 82. | 100 grid: Start at 26. Add 5. | |
| 83. | 100 grid: Start at 68. Add 4. | |
| 84. | 100 grid: Start at 52. Add 7. | |
| 85. | Adding tens: 120 + ? = 140; 120 + 50 = ? | |
| 86. | Adding tens: 24 + ? = 64, 24 + 50 = ? | |
| 87. | Adding tens: 145 + ? = 155, 145 + 30 = ? | |
| 88. | Adding tens: 57 + ? = 97, 57 + 20 = ? | |
| 89. | Adding tens: 138 + ? = 178, 178 + 20 = ? | |
| 90. | Three Up!: Add 3 to 60, 20, 50 | |
| 91. | Two Up!!: Add 2 to 23, 15, 37 | |
| 92. | Two Up!!: Add 2 to 29, 80, 12 | |
| 93. | Two Up!!: Add 2 to 14, 24, 44 | |
| 94. | One Up!: Add 1 to 65, 19, 42 | |
| 95. | Changing numbers: 24 changes to 33 | |
| 96. | Changing numbers: 19 changes to 28 | |
| 97. | Number Detectives: ? + 7 = 30 | |
| 98. | Number Detectives: ? + 24 = 30 | |
| 99. | Number Detectives: 24 + 6 = ? | |
| 100. | Number Detectives: 5 + 25 = ? | |
| 101. | Number Detectives: 22 + ? = 30 | |
| 102. | Number Detectives: 21 + ? = 30 | |
| 103. | Use the pattern: 2+4, 12+4, 120 + 40 | |
| 104. | Use the pattern: 4+1, 14+1, 140+10 | |
| 105. | Use The Pattern: 4+3, 14+3, 140+30 | |
| 106. | Use The Pattern: 2+7, 12+7, 120+70 | |
| 107. | Use The Pattern: 5+4, 15+4, 150+40 | |
| 108. | Use The Pattern: 3+6, 13+6, 130+60 | |
| 109. | Use The Pattern: 5+3, 15+3, 150+30 | |
| 110. | Make 50: 40 + 4 + ? | |
| 111. | Make 36: 20 + 14 + ? | |
| 112. | Make 39: 30 + 6 + ? | |
| 113. | Make 37: 12 + 20 + 5 | |
| 114. | Make 34: 10 + 22 + ? | |
| 115. | Beyond 20: What is 6 more than 29? | |
| 116. | Beyond 50: What is 4 more than 57? | |
| 117. | Beyond 70: What is 8 more than 78? | |
| 118. | Beyond 30: What is 4 more than 38? | |
| 119. | Beyond 60: What is 5 more than 68? | |
| 120. | Number detectives: 30+?, 50+?, 60+? =100 | |
| 121. | Number detectives: 80+?, 90+?, 40+?=100 | |
| 122. | Number detectives: 10+?, 70+?, 50+?=100 | |
| 123. | Number detectives: 25+?, 35+?, 55+? =100 | |
| 124. | Number detectives: 5+?, 45+?, 15+?=100 | |
| 125. | Add on tens: Add 10, 20 to 35 | |
| 126. | Add on tens: Add 10, 20 to 16. | |
| 127. | Add on tens: Add 10, 20 to 36 | |
| 128. | Thinking in tens: Add 10, 19 to 19 | |
| 129. | Thinking in tens: Add 10, 11 to 14 | |
| 130. | Add three numbers: 2 + 13 + 9 | |
| 131. | Add three numbers: 15 + 7 + 8 | |
| 132. | Add three numbers: 14 + 12 + 8 | |
| 133. | Add three numbers: 17 + 7 + 12 | |
| 134. | Add three numbers: 11 + 14 + 5 | |
| 135. | Number detectives: ? + 9 = 49 | |
| 136. | Number detectives: ? + 11 = 53 | |
| 137. | Crossing 100: 4 more than 99 | |
| 138. | Crossing 100: 7 more than 97 | |
| 139. | Crossing 100: 8 more than 98 | |
| 140. | Crossing 100: 9 more than 92 | |
| 141. | Crossing 100: 5 more than 97 | |
| 142. | True or False: 12+14=26 | |
| 143. | True or False: 12+12=24 | |
| 144. | True or False: 15+12=27 | |
| 145. | Number detectives: 22+9 = ? | |
| 146. | Number detectives: 51+11 = ? | |
| 147. | Number detectives: 35+? = 46 | |
| 148. | Same or Different: Click all the boxes with the answer 50. | |
| 149. | Same or Different: Click all the boxes with the answer 46. | |
| 150. | Same or Different: Click all the boxes with the answer 32. | |
| 151. | Same or Different: Click all the boxes with the answer 45. | |
| 152. | Same or Different: Click all the boxes with the answer 38. | |
| 153. | Make 50: 39+7+? = 50 | |
| 154. | Make 50: 39+5+? = 50 | |
| 155. | Make 50: 35+5+? = 50 | |
| 156. | Make 50: 38+10+? = 50 | |
| 157. | Make 50: 42+6+? = 50 | |
| 158. | Beyond 40: 6 more than 45 | |
| 159. | Beyond 70: 5 more than 79 | |
| 160. | Beyond 60: 8 more than 68 | |
| 161. | Beyond 50: 7 more than 58 | |
| 162. | Beyond 70: 9 more than 72 | |
| 163. | N/D Mysteries of 40! 34+? 30+? 38+?=40 | |
| 164. | N/D Mysteries of 40! 31+? 36+? 30+?=40 | |
| 165. | N/D Mysteries of 40! 33+? 37+? 32+?=40 | |
| 166. | N/D Mysteries of 40! 32+? 39+? 34+?=40 | |
| 167. | N/D Mysteries of 40! 31+? 35+? 37+?=40 | |
| 168. | 100 Zone: 70 + 40 = ? 90 + ? = 110, ? + 80 = 110 | |
| 169. | 100 Zone: 60 + 80 = ? 90 + ? = 140, ? + 100 = 140 | |
| 170. | 100 Zone: 70 + 80 = ? 100 + ? = 150, ? + 70 = 150 | |
| 171. | 100 Zone: 90 + 70 = ? 80 + ? = 160, ? + 60 = 160 | |
| 172. | 100 Zone: 95+7=? 101-?=99 ?+6=103 | |
| 173. | 100 Zone: 95+6=? 103-?=99 ?+6=104 | |
| 174. | 100 Zone: 98+7=? 105-?=98 ?+6=105 | |
| 175. | 100 Zone: 98+6=? 102-?=98 ?+5=103 | |
| 176. | 100 Zone: 98+3=? 101-?=97 ?+5=102 | |
| 177. | Changing Numbers 29 to 34 | |
| 178. | Changing Numbers 67 to 78 | |
| 179. | Changing Numbers 98 to 101 | |
| 180. | Changing Numbers 87 to 92 | |
| 181. | Changing Numbers 59 to 63 | |
| 182. | Changing Numbers 96 to 101 | |
| 183. | Changing Numbers 98 to 105 | |
| 184. | Changing Numbers 97 to 103 | |
| 185. | Changing Numbers 97 to 102 | |
| 186. | Changing Numbers 99 to 103 | |
| 187. | Changing Numbers 42 to 62 | |
| 188. | Changing Numbers 63 to 93 | |
| 189. | Changing Numbers 14 to 54 | |
| 190. | Changing Numbers 137 to 157 | |
| 191. | Changing Numbers 35 to 85 | |
| 192. | Number detectives *+109 = 113 | |
| 193. | Number detectives *+4 = 103 | |
| 194. | Number detectives *+5 = 103 | |
| 195. | Number detectives 235+6 = * | |
| 196. | Number detectives 98+7=* | |
| 197. | Number detectives 485+*= 493 | |
| 198. | Number detectives 515+*= 523 | |
| 199. | Number detectives 95+*=101 | |
| 200. | Number detectives 97+*=103 | |
| 201. | Use The Pattern 3+5 30+50 300+500 | |
| 202. | Use The Pattern 3+6 30+60 600+300 | |
| 203. | Use The Pattern 2+4 20+40 200+400 | |
| 204. | Use The Pattern 3+2 30+20 200+300 | |
| 205. | Use The Pattern 6+2 60+20 600+200 | |
| 206. | Make 200: 130+50+* | |
| 207. | Make 200: 70+100+* | |
| 208. | Make 200: 60+40+* | |
| 209. | Make 200: 90+30+* | |
| 210. | Make 200: 150+40+* | |
| 211. | The 1 Family - Add 1, add 11 to 35 | |
| 212. | The 1 Family - Add 1, add 11 to 27 | |
| 213. | The 1 Family - Add 1, add 11 to 49 | |
| 214. | The 1 Family - Add 1, add 11 to 57 | |
| 215. | The 1 Family - Add 1, add 11 to 83 | |
| 216. | Addition Chains 21 + 3 + 6 + 5, 60 + 4 + 3 + 2 | |
| 217. | Addition Chains 33 + 4 + 10 + 5, 28 + 3 + 9 + 8 | |
| 218. | Addition Chains 23 + 5 + 4 + 9, 60 + 8 + 3 + 10 | |
| 219. | Addition Chains 95 + 4 + 2 + 12, 94 + 3 + 3 + 7 | |
| 220. | Addition Chains 100 + 5 + 5 + 7, 99 + 3 + 6 + 2 | |
| 221. | Beyond 90: 98 + 4 | |
| 222. | Beyond 100: 104 + 7 | |
| 223. | Beyond 110: 119+3 | |
| 224. | Beyond 120: 128+6 | |
| 225. | Beyond 130: 139 + 5 | |
| 226. | Changing numbers: 12 + 10, +11, +111 | |
| 227. | Changing numbers: 28 + 10, +11, +111 | |
| 228. | Changing numbers: 49 + 10, +11, +111 | |
| 229. | Changing numbers: 88 + 10, +11, +111 | |
| 230. | Changing numbers: 29 + 10, +11, +111 | |
| 231. | Number Detectives: 100 Pairs ? + 79 = 100 | |
| 232. | Number Detectives: 100 Pairs ? + 51 = 100 | |
| 233. | Number Detectives: 100 Pairs 63 + 37 = ? | |
| 234. | Number Detectives: 100 Pairs 88 + ? = 100 | |
| 235. | Use the pattern: 6+3, 60+30, 600+300 | |
| 236. | Use the pattern: 2+4, 20+40, 200+400 | |
| 237. | Use the pattern: 2+6, 20+60, 200+600 | |
| 238. | Use the pattern: 4+9, 40+90, 400+900 | |
| 239. | Use the pattern: 1+7, 10+70, 100+700 | |
| 240. | On the Board 45 + 3* = *7 | |
| 241. | On the Board 3* + *5 = 98 | |
| 242. | On the Board 4* + 42 = *9 | |
| 243. | On the Board 3* + 62 = *6 | |
| 244. | On the Board 8* + *6 = 98 | |
| 245. | On the Board 33 + *5 = 7* | |
| 246. | On the Board *8 + 51 = 7* | |
| 247. | Adding Tens 167 + * = 197 | |
| 248. | Add Hundreds: 600+ * = 946 | |
| 249. | Add Hundreds: 200+ * = 580 | |
| 250. | Add Hundreds: 400+ * = 963 | |
| 251. | Add Hundreds: 100+ * = 319 | |
| 252. | Add Hundreds: 300+ * = 565 | |
| 253. | Adding Tens: 416 + 50 = * | |
| 254. | Adding Tens: 542 + 50 = * | |
| 255. | Add Hundreds: 500+246 | |
| 256. | Add Hundreds: 300+453 | |
| 257. | Add Hundreds: 200+43 | |
| 258. | Add Hundreds: 800+163 | |
| 259. | Adding Tens: * + 726 = 786 | |
| 260. | Adding Tens: * + 314 = 394 | |
| 261. | Add Hundreds: * + 300 = 330 | |
| 262. | Add Hundreds: * + 200 = 241 | |
| 263. | Add Hundreds: * + 800 = 819 | |
| 264. | Add Hundreds: * + 300 = 345 | |
| 265. | Add Hundreds: * + 200 = 295 | |
| 266. | Number Detectives: 100 Pairs 85 + ?, 75 + ?, 45 +?= 100 | |
| 267. | The Nine Family: 53 + 9, + 19 + 29 | |
| 268. | The Nine Family: 47 + 9, + 19 + 29 | |
| 269. | The Nine Family: 38 + 9, + 19 + 29 | |
| 270. | The Nine Family: 55 + 9, + 19, + 29 | |
| 271. | The Nine Family: 42 + 9, + 19, + 29 | |
| 272. | Mysteries of 30!: 20+?, 15+?, 5+? | |
| 273. | Mysteries of 30!: 19+?, 10+?, 16+? | |
| 274. | Mysteries of 30!: 12+?, 13+?, 14+? | |
| 275. | Mysteries of 30!: 9+?, 5+?, 7+? | |
| 276. | Mysteries of 30!: 26+?, 28+?, 22+? | |
| 277. | Number detectives: 102+98=? | |
| 278. | Number detectives: 56+92=? | |
| 279. | Number detectives: 201+99=? | |
| 280. | Same or Different: Answer 62 | |
| 281. | Same or Different: Answer 66 | |
| 282. | Same or Different: Answer 73 | |
| 283. | Hundreds and hundreds: ?64+5?9=90? | |
| 284. | Hundreds and hundreds: 364+235=? | |
| 285. | Number detectives: 30+?, 20+?, 10+?=100 | |
| 286. | Number detectives: 60+?, 50+?, 75+?=100 | |
| 287. | Number detectives: 65+?, 55+?, 85+?=100 | |
| 288. | Number detectives: 82+?, 24+?, 76+?=100 | |
| 289. | Number detectives: 89+?, 21+?, 59+?=100 | |
| 290. | Write the missing number: 15 + 1 + ? = 20 | |
| 291. | Write the missing number: ? + 11 + 2 = 20 | |
| 292. | Write the missing number: 3 + 4 + ? = 20 | |
| 293. | Write the missing number: ? + 5 + 6 = 20 | |
| 294. | Write the missing number: 5 + 8 + ? = 20 | |
| 295. | Word Wise: Subtract 14 from 20 | |
| 296. | Word Wise: 20 take away 11 | |
| 297. | Word Wise: 11 less than 19 | |
| 298. | Word Wise: 13 less than 20 | |
| 299. | Write the missing number: 4 + 8 + ? = 20 | |
| 300. | Write the missing number: 11 + ? + 2 = 20 | |
| 301. | Write the missing number: ? + 13 + 4 = 20 | |
| 302. | Write the missing number: 6 + 9 + ? = 20 | |
| 303. | Write the missing number: 4 + ? + 6 = 20 | |
| 304. | Taking Tens: 90 - ? = 70 | |
| 305. | Take 10: ? - 10 = 60 | |
| 306. | Taking tens: 40 - 30 = ? | |
| 307. | Taking tens: 50 - 20 = ? | |
| 308. | Taking tens: 80 - 40 = ? | |
| 309. | Taking tens: 70 - 10 = ? | |
| 310. | Taking tens: 70 - 40 = ? | |
| 311. | Taking tens: 40 - 30 = ? | |
| 312. | Put in the missing number: 5 + 4 + ? = 16 | |
| 313. | Put in the missing number: 11 + ? + 6 = 25 | |
| 314. | Write in the missing number: ? + 13 + 5 = 21 | |
| 315. | Put in the missing number: 9 + 2 + ? = 19 | |
| 316. | Put in the missing number: ? + 10 + 14 = 28 | |
| 317. | True or False?: 27 - 4 = 23 | |
| 318. | True or False?: 25 - 5 = 20 | |
| 319. | Subtraction Chain - 22-4=?-3=15 | |
| 320. | Subtraction Chain - ?-8=16-2=14 | |
| 321. | Subtraction Chain - 27-20-13 | |
| 322. | Subtraction Chain - ?-4=21-2=19 | |
| 323. | Subtraction Chain - 27-4=?-6=17 | |
| 324. | Subtraction Chain - ?-4=19-3=16 | |
| 325. | Subtraction Chain - 28-7=21-5=? | |
| 326. | Use the pattern: 10, 20 & 80 - 5 = ? | |
| 327. | Use the pattern: 10, 20 & 40 - 3 = ? | |
| 328. | Use the pattern: 10, 20 & 90 - 7 = ? | |
| 329. | Use the pattern: 10, 20 & 50 - 4 = ? | |
| 330. | Use the pattern: 10, 20 & 30 - 8 = ? | |
| 331. | Subtract from 100: 100 - 30, 40 & 20 | |
| 332. | Subtract from 100: 100 - 20, 30 & 70 | |
| 333. | Subtract from 100: 100 - 70, 20 & 40 | |
| 334. | Subtract from 100: 100 - 40, 90 & 50 | |
| 335. | Subtract from 100: 100 - 60, 20 & 100 | |
| 336. | Mysteries of Fifty: 50-?=42, 50-?=45 | |
| 337. | Mysteries of Fifty: 50-?=48, 50-?=43 | |
| 338. | Mysteries of Fifty: 50-?=44, 50-?=47 | |
| 339. | Mysteries of Forty: 40-?=36, 40-?=31 | |
| 340. | Mysteries of Forty: 40-?=33, 40-?=39 | |
| 341. | Mysteries of Forty: 40-?=35, 40-?=38 | |
| 342. | Mysteries of Thirty: 30-?=29, 30-?=24 | |
| 343. | Mysteries of Thirty: 30-?=21, 30-?=27 | |
| 344. | Mysteries of Thirty: 30-?=26, 30-?=22 | |
| 345. | True or False?: 23 - 5 = 18 | |
| 346. | True or False?: 26 - 13 = 13 | |
| 347. | Use the pattern 16-4=? 26-3=?, 36-4=? | |
| 348. | Use the pattern 14-3=? 24-3=?, 34-3=? | |
| 349. | Use the pattern 15-3=? 25-3=?, 35-3=? | |
| 350. | Use the pattern 18-5=? 28-5=?, 38-5=? | |
| 351. | Use the pattern 16-7=? 26-7=?, 36-7=? | |
| 352. | Use the pattern 13-6=? 23-6=?, 33-6=? | |
| 353. | Use the pattern 11-5=? 21-5=?, 31-5=? | |
| 354. | Use the pattern 12-9=? 22-9=?, 32-9=? | |
| 355. | Use the pattern 19-4=? 29-4=?, 39-4=? | |
| 356. | Use the pattern 17-8=? 27-8=?, 37-8=? | |
| 357. | 100 grid: 41 take away 6 | |
| 358. | 100 grid: 53 subtract 8 | |
| 359. | 100 grid: 32 take away 5 | |
| 360. | 100 grid: 76 take away 7 | |
| 361. | 100 grid: 54 take away 8 | |
| 362. | 100 grid: 64 take away 9 | |
| 363. | 100 grid: 84 take away 8 | |
| 364. | 100 grid: 46 take away 9 | |
| 365. | 100 grid: 23 take away 7 | |
| 366. | 100 grid: 71 take away 8 | |
| 367. | 100 grid: 34 take away 6 | |
| 368. | 100 grid: 77 take away 9 | |
| 369. | Subtract from 30: 30 - 20, 7 & 12 | |
| 370. | Subtract from 30: 30 - 15, 10 & 6 | |
| 371. | Subtract from 30: 30 - 11, 5 & 21 | |
| 372. | Subtract from 30: 30 - 8, 30 & 14 | |
| 373. | Subtract from 30: 30 - 17, 30 & 5 | |
| 374. | The 9 family: Take 9, 19 & 29 from 57 | |
| 375. | The 9 family: Take 9, 19 & 29 from 65 | |
| 376. | The 9 family: Take 9, 19 & 29 from 72 | |
| 377. | The 9 family: Take 9, 19 & 29 from 44 | |
| 378. | The 9 family: Take 9, 19 & 29 from 36 | |
| 379. | Subtract 7 from 24, 22 & 25 | |
| 380. | Subtract 5 from 21, 20 & 24 | |
| 381. | Spot the difference between 30 and 15. | |
| 382. | Spot the difference between 12 and 25. | |
| 383. | Spot the difference between 30 and 10. | |
| 384. | Spot the difference between 40 and 10. | |
| 385. | Spot the difference between 20 and 39. | |
| 386. | Spot the difference between 18 and 25. | |
| 387. | Spot the difference between 25 and 34. | |
| 388. | Spot the difference between 19 and 31. | |
| 389. | Spot the difference between 19 and 42. | |
| 390. | Spot the difference between 36 and 15. | |
| 391. | Same Difference - Difference between 10 and 40. | |
| 392. | Write the missing number: 20 + 3 + ? = 30 | |
| 393. | Write the missing number: 12 + ? + 10 = 30 | |
| 394. | Write the missing number: 15 + ? + 5 = 30 | |
| 395. | Write the missing number: 9 + ? + 12 = 30 | |
| 396. | Write the missing number: ? + 5 + 4 = 30 | |
| 397. | Write the missing number: 15 + ? + 6 = 30 | |
| 398. | Write the missing number: 18 + ? + 2 = 30 | |
| 399. | Write the missing number: 20 + 3 + ? = 30 | |
| 400. | Write the missing number: ? + 13 + 5 = 30 | |
| 401. | Write the missing number: 14 + 7 + ? = 30 | |
| 402. | Number detectives: ? + 23 = 30 | |
| 403. | Number detectives: ? + 18 = 30 | |
| 404. | True or False?: 30 - 8 = 22 | |
| 405. | True or False?: 30 - 7 = 23 | |
| 406. | True or False?: 12 - 2 = 15 - 5 | |
| 407. | True or False?: 28 - 8 = 30 - 10 | |
| 408. | True or False?: 15 - 5 = 30 - 20 | |
| 409. | True or False?: 30 - 5 = 28 - 3 | |
| 410. | Number detectives: 30 - 14 = ? | |
| 411. | Number detectives: 30 - ? = 15 | |
| 412. | Number detectives: 30 - ? = 13 | |
| 413. | Use the pattern: 9-5, 90-50, 900-500 | |
| 414. | Use the pattern: 8-5, 80-50, 800-500 | |
| 415. | Use the pattern: 6-2, 60-20, 600-200 | |
| 416. | Use the pattern: 9-8, 90-80, 900-800 | |
| 417. | Use the pattern: 5-3, 50-30, 500-300 | |
| 418. | Use the pattern: 8-2, 80-20, 800-200 | |
| 419. | Takeaway board: 3? - 14 = 23 | |
| 420. | Takeaway board: 2? - 13 = 13 | |
| 421. | Takeaway board: 4? - 22 = 27 | |
| 422. | Takeaway board: 6? - 12 = 55 | |
| 423. | Takeaway board: 5? - 26 = 32 | |
| 424. | Count Down: 6 less than 41 | |
| 425. | Count Down: 7 less than 52 | |
| 426. | Count Down: 3 less than 42 | |
| 427. | Count Down: 6 less than 43 | |
| 428. | Count Down: 8 less than 47 | |
| 429. | Taking Tens: 44 - 20 | |
| 430. | Taking Tens: 68 - 30 | |
| 431. | Taking Tens: 98 - 50 | |
| 432. | Taking Tens: 32 - 20 | |
| 433. | Taking Tens: 59 - 40 | |
| 434. | Taking Tens: 87 - 20 | |
| 435. | Taking Tens: 72 - 40 | |
| 436. | Subtract.chains 48 - 7 - 2 - 9, 35 - 4 - 3 - 8 | |
| 437. | Subtract.chains 47 - 4 - 3 - 7, 28 - 8 - 2 - 5 | |
| 438. | Subtract.chains 23 - 4 - 1 - 3, 36 - 5 - 2 - 6 | |
| 439. | Subtract.chains 32 - 4 - 7 - 4, 45 - 2 - 10 - 5 | |
| 440. | Subtract.chains 28 - 5 - 2 - 10, 50 - 5 - 3 - 2 | |
| 441. | Bargain Basement: $20 - $8 | |
| 442. | Spot the difference: 60 & 40, 12 & 18, 100 & 95 | |
| 443. | Spot the difference: 20 & 14, 17 & 9, 80 & 73 | |
| 444. | Spot the difference: 100 & 30, 19 & 11, 30 & 24 | |
| 445. | Spot the difference: 50 & 41, 100 & 92, 101 & 98 | |
| 446. | Changing Numbers 55-37=? | |
| 447. | Changing Numbers 65-54=? | |
| 448. | Changing Numbers 48-22=? | |
| 449. | Changing Numbers 36-16=? | |
| 450. | Changing Numbers 51-28=? | |
| 451. | Changing Numbers 42-32=? | |
| 452. | Write the missing number: 7 + ? + 14 = 30 | |
| 453. | Write the missing number: 15 + 4 + ? = 30 | |
| 454. | Write the missing number: 12 + 10 + ? = 30 | |
| 455. | Write the missing number: 15 + 5 + ? = 30 | |
| 456. | Write the missing number: 18 + 8 + ? = 30 | |
| 457. | Write the missing number: 5 + 5 + ? = 30 | |
| 458. | Number Detectives: ? - 15 = 10 | |
| 459. | Number Detectives: ? - 9 = 21 | |
| 460. | Number Detectives: 30 - 17 = ? | |
| 461. | Number Detectives: 30 - 14 = ? | |
| 462. | Number Detectives: 30 - ? = 12 | |
| 463. | Number Detectives: 40 - ? = 29 | |
| 464. | Takeaway board 152-? = 144 | |
| 465. | Takeaway board 547-? = 538 | |
| 466. | Takeaway board 553-? = 546 | |
| 467. | Takeaway board 291-? 285 | |
| 468. | Takeaway board 742-? = 737 | |
| 469. | Takeaway Board ?9-18 = 71 | |
| 470. | Takeaway Board 67-1?=53 | |
| 471. | Takeaway Board 79-?8=61 | |
| 472. | Takeaway Board ?7-17=50 | |
| 473. | Takeaway Board ?3-21=72 | |
| 474. | Count down 52-4=? | |
| 475. | Count down 43-6=? | |
| 476. | Count down 61-5=? | |
| 477. | Count down 36-8=? | |
| 478. | Count down 72-7=? | |
| 479. | Count down 94-9=? | |
| 480. | Eleven family: Subtract 1, 11 & 21 from 5 | |
| 481. | Eleven family: Subtract 1, 11 & 41 from 85 | |
| 482. | Eleven family: Subtract 1, 11 & 31 from 77 | |
| 483. | Eleven family: Subtract 1, 11 & 21 from 68 | |
| 484. | Eleven family: Subtract 1, 11 & 71 from 96 | |
| 485. | Subtract 2, 12 from 100 | |
| 486. | Subtract 3, 13 from 100 | |
| 487. | Subtract 5, 15 from 100 | |
| 488. | Subtract 7, 17 from 100 | |
| 489. | Subtract 8, 18 from 100 | |
| 490. | Subtract 4, 14 from 100 | |
| 491. | Subtraction chains 80-6-5-3, 70-4-2-5 | |
| 492. | Subtraction chains 30-9-2-5, 60-5-4-3 | |
| 493. | Subtraction chains 40-5-6-3, 50-9-2-8 | |
| 494. | Subtraction chains 90-3-5-3, 40-2-8-5 | |
| 495. | Subtraction chains 60-9-2-3, 50-3-6-10 | |
| 496. | Changing Numbers 84 to 63 | |
| 497. | Changing Numbers 100 to 44 | |
| 498. | Changing Numbers 40 to 24 | |
| 499. | Changing Numbers 124 to 98 | |
| 500. | Write the missing number: 25 + 3 + ? = 35 | |
| 501. | Write the missing number: 25 + 4 + ? = 35 | |
| 502. | Write the missing number: 25 + 2 + ? = 35 | |
| 503. | Write the missing number: 25 + 5 + ? = 35 | |
| 504. | Write the missing number: 25 + 1 + ? = 35 | |
| 505. | Write the missing number: 35 + 5 + ? = 50 | |
| 506. | Write the missing number: 35 + 7 + ? = 50 | |
| 507. | Write the missing number: 35 + 9 + ? = 50 | |
| 508. | Write the missing number: 35 + 13 + ? = 50 | |
| 509. | Write the missing number: 35 + 11 + ? = 50 | |
| 510. | Subtracting tens: 88 - ? = 48 | |
| 511. | Subtracting tens: 57 - ? = 27 | |
| 512. | Subtracting tens: 44 - ? = 24 | |
| 513. | Subtracting tens: 86 - ? = 56 | |
| 514. | Subtracting tens: 94 - ? = 24 | |
| 515. | Subtracting tens 55 - 20 = ? | |
| 516. | Subtracting tens 48 - 20 = ? | |
| 517. | Subtracting tens 72 - 30 = ? | |
| 518. | Subtracting tens 87 - 60 = ? | |
| 519. | Subtracting tens 91 - 60 = ? | |
| 520. | The Mysteries of 40!: 40-?=31, 40-?=33, 40-?=30 | |
| 521. | The Mysteries of 40!: 40-?=51, 40-?=38, 40-?=32 | |
| 522. | The Mysteries of 40!: 40-?=32, 40-?=29, 40-?=37 | |
| 523. | The Mysteries of 40!: 40-?=29, 40-?=38, 40-?=39 | |
| 524. | The Mysteries of 40!: 40-?=30, 40-?=33, 40-?=36 | |
| 525. | The Mysteries of 40!: 40-?=29, 40-?=31, 40-?=33 | |
| 526. | The Mysteries of 40!: 40-?=28, 40-?=32, 40-?=18 | |
| 527. | The Mysteries of 30!: 30-?=26, 30-?=23, 30-?=27 | |
| 528. | The Mysteries of 30!: 30-?=23, 30-?=13, 30-?=3 | |
| 529. | The Mysteries of 30!: 30-?=18, 30-?=15, 30-?=12 | |
| 530. | The Mysteries of 30!: 30-?=14, 30-?=19, 30-?=9 | |
| 531. | Subtraction chains: 30-4-10-8, 30-5-10-7 | |
| 532. | Subtraction chains: 30-4-16-8, 30-5-3-11 | |
| 533. | Subtraction chains: 30-8-6-12, 30-6-3-5 | |
| 534. | Subtraction chains: 30-3-4-13, 30-6-5-7 | |
| 535. | Subtraction chains: 30-10-9-4, 30-5-9-7 | |
| 536. | Changeover: 7 less than 301 | |
| 537. | Changeover: 6 less than 904 | |
| 538. | Changeover: 6 less than 503 | |
| 539. | Changeover: 7 less than 204 | |
| 540. | Changeover: 8 less than 305 | |
| 541. | Tropical fruit feast: 4 x $5 | |
| 542. | Times change: Click all statements correctly describing the array | |
| 543. | Times change: Click all statements correctly describing the array | |
| 544. | Times change: Click all statements correctly describing the array | |
| 545. | Times change: Click all statements correctly describing the array | |
| 546. | Times change: Click all statements correctly describing the array | |
| 547. | Dollar Shares: Half of $6 | |
| 548. | Bozo and the cupcakes: Half of 10 is ? | |
| 549. | Bozo and the cupcakes: 10 is half of ? | |
| 550. | Half of 46 buses | |
| 551. | Bozo and the cupcakes: Half of 8 is ? | |
| 552. | Bozo and the cupcakes: 8 is half of ? | |
| 553. | Kind Aunties: Share $20 among 4 | |
| 554. | Dividing the cake | |
| 555. | Dividing the cake | |
| 556. | Dino Dinner Divide - working backwards | |
| 557. | Cake Work - working backwards | |
| 558. | Build a Total - number sequence, 15 | |
| 559. | Piecing the Petals: Select correct half to complete picture | |
| 560. | Tower In Two: Select correct half to complete picture | |
| 561. | Half A Crown - select correct half to complete picture | |
| 562. | Half Lighting - select correct half to complete picture | |
| 563. | Torn In Two - select correct half to complete picture | |
| 564. | Fragment of a Flag - select correct half to complete picture | |
| 565. | Tiger in Two - select correct half to complete picture | |
| 566. | Half A Butterfly - select correct half to complete picture | |
| 567. | Half A Stool - select correct half to complete picture | |
| 568. | The Shirt Off My Back - select correct half to complete picture | |
| 569. | Half A Hat - select correct half to complete picture | |
| 570. | The Chicken Story: forty + thirty | |
| 571. | 16 go to WaterWorld: 5+4+3+? | |
| 572. | 17 go to Waterworld: 6+5+2+? | |
| 573. | 14 go to Waterworld: 6+3+2+? | |
| 574. | 18 go to WaterWorld: 3+3+2+? | |
| 575. | 15 go to WaterWorld: 5+3+2+? | |
| 576. | 16 go to Waterworld? 2+3+3+? | |
| 577. | Chicken multiplication: 3 + 3 + 3 = ? | |
| 578. | Dollar Shares: Half of $10 | |
| 579. | Dollar Shares: Half of $8 | |
| 580. | Bessie Finds Half: 6 geese a-laying | |
| 581. | Bessie Finds Half: 8 maids a-milking | |
| 582. | Bessie Finds Half: 12 proud pink flamingos | |
| 583. | The Chicken Story: sixty + thirty | |
| 584. | The Chicken Story: fifty + twenty | |
| 585. | 19 go to Waterworld: 5+4+3+? | |
| 586. | Make 50: 32+8+? = 50 | |
| 587. | Tropical Fruit Feast: $10 = 5 x ? | |
| 588. | Tropical Fruit Feast: $8 = 4 x ? | |
| 589. | Tropical fruit feast: 2 x $4 | |
| 590. | Tropical fruit feast: 2 x $2 | |
| 591. | Movie money: $18 / 3 | |
| 592. | Bessie Finds Half: 12 chocolates | |
| 593. | Halving Lambs: A group of 18 lambs | |
| 594. | Finding Half: 6 basketballs | |
| 595. | Give Gary Half: 6 choc bars | |
| 596. | Half the Party: 8 kookaburras up a gum tree | |
| 597. | Freezing Fractions - 12 Antarctic penguins | |
| 598. | Huge Grinley's: 1 quarter of 4 cars | |
| 599. | Quartered for Serving: 8 apricot marshmallows | |
| 600. | Quartered Crop- 16 fresh green crisp juicy apples | |
| 601. | Sharing Quarters - 12 bright red toy steam engines | |
| 602. | Saving Half: $20 / 2 | |
| 603. | Fractions with Fauna: 60 cents halved | |
| 604. | Fledgling Fractions: 60 cents / 2 | |
| 605. | Cash Halves - Half of: $18 | |
| 606. | Share Bears: A group of 16 fluffy teddies to be halved | |
| 607. | Find Half: A batch of 14 steak 'n' bacon pies | |
| 608. | Half of 10 fierce pirates | |
| 609. | 20 swimming swans: Put half on each pond | |
| 610. | Find Half: 6 Flamingoes Balancing | |
| 611. | Find Half: 8 monsters mixing | |
| 612. | Half and half: 8 pieces | |
| 613. | Half the herd. 12 bulls | |
| 614. | 10 butterflies fluttering: Halve them! | |
| 615. | Four moist mangos_shared | |
| 616. | Make 1 whole butterfly | |
| 617. | Make 1 whole crown | |
| 618. | Make 1 whole flower | |
| 619. | Make 1 whole tophat | |
| 620. | Make 1 whole building | |
| 621. | Six Bright Berries | |
| 622. | David Determines Quarters: 12 supersonic jets | |
| 623. | David Determines Quarters: 8 scrumptious sponges | |
| 624. | Faye Feeds in Quarters: 16 pigeons | |
| 625. | David and Fran Take Fractions: Half of 8 | |
| 626. | David at the airport: Half of 6 | |
| 627. | David at the hospital: One quarter of 4 | |
| 628. | Build A Total - number sequence, 40 | |
| 629. | Build A Total - number sequence, 50 | |
| 630. | Build A Total - number sequence, 55 | |
| 631. | One Juicy Apple | |
| 632. | Gavin at the shop: 60c + 10c | |
| 633. | Damien at the shop: 10c + 5c | |
| 634. | Jenny at the shop: 60c + 30c | |
| 635. | Sarah at the shop: 50c + 40c | |
| 636. | Emma at the shop: 2 x 5c | |
| 637. | Samuel at the shop: 3 x 10c | |
| 638. | Zachary at the shop: 3 x 5c | |
| 639. | Emma at the shop: 25c + 15c | |
| 640. | Charlotte at the shop: 60c + 25c | |
| 641. | Marjorie at the shop: 70c + 15c | |
| 642. | Felicity at the shop: 50c + 45c | |
| 643. | Amy at the shop: 50c + 10c | |
| 644. | David at the shop: 45c + 30c | |
| 645. | Alisa at the shop: 40c + 25c | |
| 646. | Ayesha at the shop: 25c + 10c | |
| 647. | Sherwyn at the shop: 50c + 30c | |
| 648. | Fizah at the shop: 25c + 30c | |
| 649. | Shyla at the shop: 25c + 70c |