Use and record a range of mental strategies to solve addition and subtraction problems involving one- and two-digit numbers, including:counting on from the larger number to find the total of two numbers, counting back from a number to find the number rema
1. | 2 less, 2 more than 4 | |
2. | 2 less, 2 more than 12 | |
3. | 2 less, 2 more than 16 | |
4. | 2 less, 2 more than 9 | |
5. | 2 less, 2 more than 11 | |
6. | Which number is 10 more than 14? | |
7. | 2 less, 2 more than 28 | |
8. | 2 less, 2 more than 15 | |
9. | 2 less, 2 more than 23 | |
10. | 2 less, 2 more than 13 | |
11. | Changing numbers: 36 to 39 | |
12. | Changing Numbers: 24 to 21 | |
13. | Changing Numbers: 66 to 76 | |
14. | Changing Numbers: 80 to 78 | |
15. | Changing Numbers: 50 to 45 | |
16. | Changing Numbers: 35 to 40 | |
17. | Changing Numbers: 10 to 15 | |
18. | Changing Numbers: 20 to 30 | |
19. | Changing Numbers: 45 to 35 | |
20. | Changing Numbers: 90 to 100 | |
21. | Changing Numbers: 85 to 80 | |
22. | Changing Numbers: 45 to 50 | |
23. | Changing Numbers: 99 to 100 | |
24. | Changing Numbers: 24 to 14 | |
25. | Changing Numbers: 85 to 80 | |
26. | Changing Numbers: 48 to 50 | |
27. | Up We Go - Start at 3. Add 4 more. | |
28. | Up We Go - Start at 2. Add 4 more. | |
29. | Up We Go - Start at 6. Add 2 more. | |
30. | Up We Go - Start at 5. Add 2 more. | |
31. | Up we go - What is 5 plus 3? | |
32. | Up we go - What is 3 + 2? | |
33. | Up we go - 4 add 2 | |
34. | 20s Zone - 4 more than 22 | |
35. | 20s Zone - 4 more than 21 | |
36. | 20s Zone - 3 more than 24 | |
37. | Addition chain: 4 + 1 = 5, 5 + 2 = ? | |
38. | Addition chain: 2 + 2 = 4, 4 + 1 = ? | |
39. | Addition chain: 3 + 2 = 5, 5 + 1 = ? | |
40. | Teens zone: 7 more than 8 | |
41. | Teens zone: 2 more than 9 | |
42. | Word Wise: The sum of 10 and 4 | |
43. | Word Wise: Add 1 and 12 | |
44. | Word Wise: Add 5 to 7 | |
45. | Word Wise: 7 plus 6 | |
46. | Word Wise: 8 plus 3 | |
47. | Word Wise: 7 plus 4 | |
48. | Use the Pattern: 4+3, +4, +5 | |
49. | 20s Zone: 16 + 4 = ?, 16 + 6 = ? | |
50. | 20s Zone: 18 + 2 = ?, 18 + 5 = ? | |
51. | Addition Chain: 5 + 3 = ? + 3 = ? | |
52. | Addition Chain: 6 + 4 = ? + 5 = ? | |
53. | Addition Chain: 2 + 4 = ? + 5 = ? | |
54. | Addition Chain: 3 + 9 = ? + 1 = ? | |
55. | Addition Chain: 4 + 3 = ? + 5 = ? | |
56. | Use the Pattern: 4+0, +10, +20 | |
57. | Use the Pattern: 5+0, +10, +20 | |
58. | Use the Pattern: 7+0, +10, +20 | |
59. | Use the Pattern: 6+0, +10, +20 | |
60. | Use the Pattern: 3+0, +10, +20 | |
61. | Use the Pattern: 9+0, +10, +20 | |
62. | Is the answer...?: Click all boxes with answer 8. | |
63. | Is the answer...?: Click all boxes with answer 12 | |
64. | Is the answer...?: Click all boxes with answer 14 | |
65. | Is the answer...?: Click all boxes with answer 11 | |
66. | Is the answer...?: Click all boxes with answer 15 | |
67. | Is the answer...?: Click all boxes with answer 13 | |
68. | Changing Numbers: 24 to 34 | |
69. | Changing Numbers: 25 to 26 | |
70. | Changing Numbers: 17 to 21 | |
71. | Changing Numbers: 10 to 21 | |
72. | Changing Numbers: 7 to 11 | |
73. | Changing Numbers: 8 to 13 | |
74. | Changing Numbers: 9 to 12 | |
75. | Changing Numbers: 17 to 21 | |
76. | Changing Numbers: 18 to 21 | |
77. | Changing Numbers: 27 to 31 | |
78. | Changing Numbers: 24 to 28 | |
79. | Changing Numbers: 29 to 39 | |
80. | Changing Numbers: 30 to 50 | |
81. | Changing Numbers: 48 to 50 | |
82. | 30s Zone: 4 more than 28 | |
83. | 30s Zone: 7 more than 25 | |
84. | 30s Zone: 5 more than 29 | |
85. | 30s Zone: 9 more than 29 | |
86. | Use the Pattern: 5+4,15+4,25+4 | |
87. | Use the Pattern: 6+4,16+4,26+4 | |
88. | Use the Pattern: 10+2,20+2,30+2 | |
89. | Thrilling Thirties: 3 more than 29 | |
90. | Thrilling Thirties: Five more than twenty-seven | |
91. | Thrilling Thirties: 4 more than 28 | |
92. | Thrilling Thirties: 5 more than 26 | |
93. | Thrilling Thirties: 4 plus 29 | |
94. | Fabulous Forties: 4 more than 38 | |
95. | Fabulous Forties: 6 plus 37 | |
96. | Fabulous Forties: 5 more than 39 | |
97. | Fabulous Forties: 6 plus 36 = ? | |
98. | Fabulous Forties: 4 more than 37 = ? | |
99. | Word Wise: 15 added to 6 | |
100. | Beyond 30 - 4 more than 38 | |
101. | Double Up and Add: Double 6 plus 4 | |
102. | Double Up and Add: Double 10 plus 7 | |
103. | Double Up and Add: Double 9 plus 2 | |
104. | Same or Different: Click all the boxes with the answer 28. | |
105. | Three Up!: Add 3 to 60, 20, 50 | |
106. | Two Up!!: Add 2 to 23, 15, 37 | |
107. | Two Up!!: Add 2 to 29, 80, 12 | |
108. | Two Up!!: Add 2 to 14, 24, 44 | |
109. | One Up!: Add 1 to 65, 19, 42 | |
110. | Changing numbers: 24 changes to 33 | |
111. | Changing numbers: 19 changes to 28 | |
112. | Changing numbers: 13 changes to 21 | |
113. | Changing numbers: 9 changes to 17 | |
114. | Changing numbers: 8 changes to 17 | |
115. | Happy Landings 6 - 3 | |
116. | Happy Landings 5 minus 3 | |
117. | Happy Landings 4 - 3 | |
118. | Happy landings 9 take away 3 | |
119. | Happy Landings 9 minus 6 | |
120. | Happy landings 10 take away 2 | |
121. | Subtraction chain 8 - 4 = 4, 4 - 2 = ? | |
122. | Subtraction chain 7 - 2 = 5, 5 - 2 = ? | |
123. | Subtraction chain 9 - 3 = 6, 6 - 2 = ? | |
124. | Subtraction chain 6 - 3 = 3, 3 - 1 = ? | |
125. | Subtraction chain 8 - 2 = 6, 6 - 1 = ? | |
126. | Happy Landings 8 minus 5 | |
127. | Happy Landings Take 4 from 9 | |
128. | Happy Landings 8 Take away 4 | |
129. | Subtraction chain 9 - 1 = 8, 8 - 2 = ? | |
130. | Subtraction chain 8 - 3 = 5, 5 - 2 = ? | |
131. | Subtraction chain 6 - 2 = 4, 4 - 2 = ? | |
132. | Subtraction chain 7 - 3 = 4, 4 - 1 = ? | |
133. | Subtraction chain 9 - 2 = 7, 7 - 3 = ? | |
134. | Crossing 10: Add 7 to 8 | |
135. | Crossing 10: 14-4; 14-7=? | |
136. | Crossing 10: Add 5 to 8 | |
137. | Crossing 10: Add 5 to 9 | |
138. | Crossing 10: Add 9 to 6 | |
139. | Crossing 10: 14-4; 10-7=? | |
140. | Crossing 10: 13-3; 10-9=? | |
141. | Crossing 10: 17-7; 17-9=? | |
142. | Crossing 10: Add 8 to 5 | |
143. | Crossing 10: Add 9 to 9. | |
144. | Hide and Seek: 7 trolls - 5 | |
145. | Hide and Seek: 7 trolls - 4 | |
146. | Hide and Seek: 6 trolls - 4 | |
147. | Hide and Seek: 8 trolls - 4 | |
148. | 7 Clocks: How many more to make 15? | |
149. | 9 Cars: How many more to make 16? | |
150. | Number detectives: 14 - 6 = ? | |
151. | Number detectives: 15 - 9 = ? | |
152. | Number detectives: 11 - 8 = ? | |
153. | Number detectives: 13 - 5 = ? | |
154. | Number detectives: 15 - 13 = ? | |
155. | Party time: 17 - 9 | |
156. | Party time: 16 - 9 | |
157. | Party time: 19 - 9 | |
158. | Party time: 18 - 9 | |
159. | Party time: 12 - 9 | |
160. | Party time: 11 - 9 | |
161. | Party time: 10 - 9 | |
162. | Party time: 9 - 9 | |
163. | Party time: 15 - 9 | |
164. | Find the first number: ? count on 5 = 8 | |
165. | Find the first number: ? count on 1 = 8 | |
166. | Find the first number: ? count on 2 = 8 | |
167. | Find the first number: ? count back 1 = 8 | |
168. | Find the first number: ? count back 2 = 8 | |
169. | Find the first number: ? count back 3 = 8 | |
170. | Find the first number: ? count back 4 = 8 | |
171. | Find the first number: ? count on 3 = 8 | |
172. | Find the first number: ? count on 4 = 8 | |
173. | Card games: Which is lower, 4 + 2 or 6 + 1? | |
174. | Card games: Which is lower, 7 + 3 or 5 + 4? | |
175. | Card games: Which is lower, 6 + 4 or 2 + 3? | |
176. | Card games: Which is lower, 4 + 3 or 1 + 9? | |
177. | Card games: Which is higher, 4 + 5 or 5 + 1? | |
178. | Which number is 10 less than 20? | |
179. | Which number is 10 less than 50? | |
180. | Number detectives 18 -10 = ? | |
181. | Word Wise: Subtract 14 from 20 | |
182. | Word Wise: Subtract 5 from 19 | |
183. | Word Wise: Subtract 4 from 17 | |
184. | Word Wise: Subtract 9 from 20 | |
185. | Word Wise: 17 take away 6 | |
186. | Word Wise: 19 take away 9 | |
187. | Word Wise: 20 take away 11 | |
188. | Word Wise: 14 take away 6 | |
189. | Word Wise: 11 less than 19 | |
190. | Word Wise: 13 less than 20 | |
191. | Word Wise: 6 less than 12 | |
192. | Word Wise: 11 less than 16 | |
193. | Use the pattern: 8 - 4, - 3, - 2 | |
194. | Use the pattern: 6 - 6, - 5, - 4 | |
195. | Slippery fish 9 - 9 = ? | |
196. | Slippery fish 14 - 8 = ? | |
197. | Slippery fish 18 - 12 = ? | |
198. | Slippery fish 12 - 3 = ? | |
199. | Slippery fish 15 - 10 = ? | |
200. | Slippery fish 10 - 9 = ? | |
201. | Slippery fish 11 - 7 = ? | |
202. | Changing numbers: 18 to 9 | |
203. | Changing numbers: 16 to 12 | |
204. | Changing numbers: 12 to 7 | |
205. | Changing numbers: 20 to 9 | |
206. | Changing numbers: 14 to 9 | |
207. | The 20s zone: 24 - 4 = ?, 24 - 7 = ? | |
208. | Take 10: 40 - 10 = ? | |
209. | Subtraction chain 20 - 3 = 17, 17 - 3 = ? | |
210. | Subtraction chain 20 - 6 = 14, 14 - 5 = ? | |
211. | Subtraction chain 20 - 5 = 15, 15 - 2 = ? | |
212. | Subtraction chain 20 - 9 = 11, 11 - 3 = ? | |
213. | Word Wise!: Subtract 13 from 20 | |
214. | Word Wise!: Subtract 15 from 20 | |
215. | Word Wise!: Subtract 8 from 20 | |
216. | Word Wise!: Subtract 11 from 20 | |
217. | Word Wise!: Subtract 17 from 20 | |
218. | Word Wise!: Subtract 5 from 20 | |
219. | Word Wise!: 12 minus 7 | |
220. | Word Wise!: 20 take away 4 | |
221. | Word Wise!: 20 take away 7 | |
222. | Word Wise!: 19 less than 19 | |
223. | Word Wise!: 3 less than 20 | |
224. | Word Wise!: 10 less than 20 | |
225. | Hide and seek: 10 trolls - 5 | |
226. | Hide and seek: 14 trolls - 5 | |
227. | Hide and seek: 11 trolls - 5 | |
228. | Slippery fish 16 - 7 | |
229. | Subtraction Chain - 27-20-13 | |
230. | Subtraction Chain - 28-7=21-5=? | |
231. | Subtract 8 (from 16, 15, 12) | |
232. | Subtract 6 (from 12, 11, 13) | |
233. | Subtract 5 (from 14, 11, 8) | |
234. | Subtract 7 (from 14, 16, 11) | |
235. | Subtract 4 (from 10, 12, 8) | |
236. | Use the pattern 16-4=? 26-3=?, 36-4=? | |
237. | Use the pattern 14-3=? 24-3=?, 34-3=? | |
238. | Use the pattern 15-3=? 25-3=?, 35-3=? | |
239. | Use the pattern 18-5=? 28-5=?, 38-5=? | |
240. | Subtract 8 from 17, 13 & 11 | |
241. | Subtract 6 from 13, 15 & 11 | |
242. | Subtract 7 from 24, 22 & 25 | |
243. | Subtract 5 from 21, 20 & 24 | |
244. | Subtract 9 from 12, 15 & 17 | |
245. | 8 Spaces to Park: 4 cars. How many more cars can fit? | |
246. | 8 spaces to park: 8 - 4 | |
247. | 8 spaces to park: 8 - 6 | |
248. | 8 spaces to park: 8 - 7 | |
249. | 8 spaces to park: 8 - 5 | |
250. | 8 Spaces to Park: 5 cars. How many more cars can fit? | |
251. | 8 Spaces to Park: 6 cars. How many more cars can fit? | |
252. | 8 Spaces to Park: 7 cars. How many more cars can fit? | |
253. | Birds flock together 3 + 2 = ? | |
254. | Birds flock together 6 + 2 = ? | |
255. | Birds flock together 1 + 7 = ? | |
256. | Birds flock together 4 + 4 = ? | |
257. | Birds flock together 5 + 3 = ? | |
258. | Card games: 6 + 4 = ?, 2 + 3 = ? | |
259. | Card games: 7 + 4 = ?, 9 + 8 = ? | |
260. | Card games: 7 + 9 = ?, 8 + 3 = ? | |
261. | Card games: 5 + 8 = ?, 7 + 9 = ? | |
262. | Card games: 9 + 9 = ?, 8 + 6 = ? | |
263. | The 20s zone: 28 - 8 = ?, 28 - 9 = ? | |
264. | The 20s zone: 23 - 3 = ?, 23 - 4 = ? | |
265. | The 20s zone: 26 - 6 = ?, 26 - 8 = ? | |
266. | Card games: Which is higher, 5 + 4 or 3 + 7? | |
267. | Card games: Which is higher, 3 + 5 or 4 + 8? | |
268. | Card games: Which is higher, 5 + 9 or 6 + 4? | |
269. | Card games: Which is higher, 4 + 6 or 9 + 3? | |
270. | Card games: Which is lower, 9 + 3 or 6 + 7? | |
271. | Card games: Which is lower, 2 + 6 or 4 + 2? | |
272. | The 20s Zone: Add 6 to 18 | |
273. | The 20s Zone: Add 5 to 16 | |
274. | The 20s Zone: Add 7 to 15 | |
275. | Teen Zone: Add 9 to 7 | |
276. | Teen Zone: Take 8 from 15 | |
277. | Teen Zone: Take 7 from 16 | |
278. | Teen Zone: Take 5 from 13 | |
279. | Teen Zone: Take 7 from 14 | |
280. | Teen Zone: Take 9 from 17 | |
281. | Teen Zone: Take 7 from 12 | |
282. | Teen Zone: Take 8 from 15 | |
283. | Teen Zone: Take 8 from 15 | |
284. | Teen Zone: Add 5 to 7 | |
285. | The 20s Zone: Add 7 to 17 | |
286. | Teen Zone: Take 7 from 15 | |
287. | Teen Zone: Take 9 from 16 | |
288. | Teen Zone: Take 9 from 18 | |
289. | Teen Zone: Take 11 from 17 | |
290. | Teen Zone: Take 9 from 14 | |
291. | Teen Zone: Add 6 to 6 | |
292. | The 20s Zone: Add 6 to 17 | |
293. | The 20s Zone: Add 6 to 15 | |
294. | The 20s Zone: Add 6 to 19 | |
295. | Teen Zone: Add 8 to 7 | |
296. | Crossing 10: Take 8 from 17 | |
297. | Crossing 10: Take 9 from 17 | |
298. | Crossing 10: Take 9 from 13 | |
299. | Crossing 10: Take 9 from 15 | |
300. | Crossing 10: Take 9 from 14 | |
301. | Crossing 10: Take 8 from 13 | |
302. | Crossing 10: Take 7 from 14 | |
303. | The 20s Zone: Take 6 from 24 | |
304. | The 20s Zone: Take 8 from 24 | |
305. | The 20s Zone: Take 6 from 25 | |
306. | The 20s Zone: Take 4 from 21 | |
307. | The 20s Zone: Take 8 from 25 | |
308. | The 20s Zone: Take 9 from 23 | |
309. | The 20s Zone: Take 7 from 23 | |
310. | The 20s Zone: Take 8 from 26 | |
311. | The 20s Zone: Take 7 from 22 | |
312. | The 20s Zone: Take 8 from 27 | |
313. | Count back: Start at 16. Count back 5 | |
314. | 9 Clocks: How many more to make 15? | |
315. | 5 Clocks: How many more to make 15? | |
316. | 7 Cars: How many more to make 16? | |
317. | Card Tricks: Red 3 + Black 7 |