Add and subtract integers using mental and written strategies
1. | 10 000 less, 1000 more than 9 630 258 | |
2. | Add hundreds: 346 + 400, 1426 + 500, 200 + 7019 | |
3. | Adding hundreds: Multiple operations with hundreds numbers | |
4. | Adding hundreds: Multiple operations with hundreds numbers | |
5. | Adding hundreds: Multiple operations with hundreds numbers | |
6. | Adding hundreds: Multiple operations with hundreds numbers | |
7. | Number detectives: Add/subtract hundreds numbers | |
8. | Number detectives: Add/subtract hundreds numbers | |
9. | Number detectives: Add/subtract hundreds numbers | |
10. | Number detectives: Add/subtract hundreds numbers | |
11. | Number detectives: Add/subtract hundreds numbers | |
12. | Give or take a thousand: 283 557+4000 | |
13. | Give or take a thousand: 7000 more than 456 821 | |
14. | Give or take a thousand: Add 8000 and 197 523 | |
15. | Give or take a thousand: Sum of 7000 and 197 237 | |
16. | Give or take a thousand: Sum of 128764 and 6000 | |
17. | Give or take a thousand: 164849 more than 7000 | |
18. | Give or take a thousand: 345 219 greater than 7000 | |
19. | Give or take a thousand: Sum of 349 285 and 4000 | |
20. | Give or take a thousand: Add 319 564 to 3000 | |
21. | Give or take a thousand: 7000 more than 63 489 | |
22. | Give or take a thousand: 8000 more than 49 735 | |
23. | Changing numbers: 36 159 add 100 add 1 add 10 | |
24. | Changing numbers: 23 855 add 100 add 1 add 10 | |
25. | Changing numbers: 36 052 add 1000 add 1 add 10 | |
26. | Changing numbers: 23 615 add 1000 add 100 add 10 | |
27. | Changing numbers: 36 925 add 10 add 1000 add 1 | |
28. | Use the Pattern: 43 + 39, 43 + 40, 430 + 400 | |
29. | Use the Pattern: 56 + 70, + 69, 560 + 700 | |
30. | Use the Pattern: 34 + 80, + 79, 340 + 800 | |
31. | Use the Pattern: 27 + 90, + 89, 270 + 900 | |
32. | Use the Pattern: 62 + 79, 62 + 80, 620 + 800 | |
33. | Add It Up: Addition of 4-digit numbers with regrouping | |
34. | Add It Up: Addition of 4-digit numbers with regrouping | |
35. | Add It Up: Addition of 4-digit numbers with regrouping | |
36. | Add It Up: Addition of 4-digit numbers with regrouping | |
37. | Add It Up: Addition of 4-digit numbers with regrouping | |
38. | Add It Up: Addition of 4-digit numbers with regrouping | |
39. | Add It Up: Addition of 4-digit numbers with regrouping | |
40. | Add It Up: Addition of 4-digit numbers with regrouping | |
41. | Add It Up: Addition of 4-digit numbers with regrouping | |
42. | Add It Up: Addition of 4-digit numbers with regrouping | |
43. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
44. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
45. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
46. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
47. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
48. | Add board: Write missing numbers in vertical addition of 2- and 3-digit numbers | |
49. | Use the pattern 6+7 60+70 160+170 | |
50. | Use the pattern 12+8 120+80 1200+800 | |
51. | Use the pattern 21+9 210+90 2100+900 | |
52. | Use the pattern 3+8 30+80 300+800 | |
53. | Use the pattern 16+4 160+40 1600+400 | |
54. | Number detectives Three's a breeze: 31+29+*=87 | |
55. | Number detectives Three's a breeze: 42+12+*=74 | |
56. | Number detectives Three's a breeze: 18+22+*=81 | |
57. | Number detectives Three's a breeze: 56+21+*=88 | |
58. | Number detectives Three's a breeze: 27+23+*=58 | |
59. | Same or different : Click all the boxes with the same answer. | |
60. | Same or different : Click all the boxes with the same answer. | |
61. | T/f Double sided eqns | |
62. | T/f Double sided eqns | |
63. | T/f Double sided eqns | |
64. | T/f Double sided eqns | |
65. | T/f Double sided eqns | |
66. | Add it up 4126+5999 | |
67. | Add it up 5672+6928 | |
68. | Add it up 2369+9872 | |
69. | Add it up 8273+7989 | |
70. | Add it up 7827+6376 | |
71. | Adding hundreds: 695+*=959, 3492+500=*, 600m/t503=* | |
72. | Adding hundreds: 364+*=1264, 426+600=*, 200m/t 236 =* | |
73. | Adding hundreds 562+*=862, 658+200=*, 500m/t 352=* | |
74. | Adding hundreds: 263+*=663, 222+500=*, 600m/t406=* | |
75. | Adding hundreds 462+*=862, 426+300=* 800m/t169=* | |
76. | Give or take a thousand Add 4000 to 2668 | |
77. | Give or take a thousand Add 8000 to 7558 | |
78. | Give or take a thousand what is 5000 m/t 23669? | |
79. | Give or take a thousand what is 6000 m/t 8331? | |
80. | Give or take a thousand what is 19369 + 3000? | |
81. | Add these three numbers 24+45+16=? | |
82. | Add these three numbers 20+35+16=? | |
83. | Add these three numbers 45+15+14=? | |
84. | Add these three numbers 26+12+22=? | |
85. | Add these three numbers 37+13+18=? | |
86. | Number detectives: Four's no chore - Add 4 clustered numbers | |
87. | Number detectives: Four's no chore - Add 4 clustered numbers | |
88. | Number detectives: Four's no chore - Add 4 clustered numbers | |
89. | Number detectives: Four's no chore - Add 4 clustered numbers | |
90. | Number detectives: Four's no chore - Add 4 clustered numbers | |
91. | Same or different: Click all the boxes with the same answer | |
92. | Same or different: Click all the boxes with the same answer | |
93. | Same or different: Click all the boxes with the same answer | |
94. | Same or different: Click all the boxes with the same answer | |
95. | Same or different: Click all the boxes with the same answer | |
96. | Make 150 70+44+* | |
97. | Make 120 52+37+* | |
98. | Make 140 96+14+* | |
99. | Make 130 75+41+* | |
100. | Make 160 57+33+* | |
101. | T/F double sided: 56+14=35+35, etc | |
102. | T/F double sided: 23+12=65+30, etc | |
103. | T/F double sided: 21+80=92-42, etc | |
104. | T/F double sided: 42+46=19+69 | |
105. | T/F double sided: 32+18=25+25 | |
106. | Give or Take 10 000 40000+227558 | |
107. | Give or Take 10 000 50 000+23 565 | |
108. | Give or Take 10 000 40 000+56 780 | |
109. | Give or Take 10 000 20 000 + 239 330 | |
110. | Give or Take 10 000 50 000+50 332 | |
111. | Number detectives: Add 4 clustered tens numbers | |
112. | Number detectives: Add 4 clustered tens numbers | |
113. | Number detectives: Add 4 clustered tens numbers | |
114. | Number detectives: Add 4 clustered tens numbers | |
115. | Number detectives: Add 4 clustered tens numbers | |
116. | Negative Thinking 2 + * = -4 | |
117. | Adding the big ones: Write the missing numbers in vertical addition of large whole numbers | |
118. | Adding the big ones: Write the missing numbers in vertical addition of large whole numbers | |
119. | Adding the big ones: Write the missing numbers in vertical addition of large whole numbers | |
120. | Adding the big ones: Write the missing numbers in vertical addition of large whole numbers | |
121. | Adding the big ones: Write the missing numbers in vertical addition of large whole numbers | |
122. | Changing numbers: Addition/subtraction using negative integers | |
123. | Changing numbers: Addition/subtraction using negative integers | |
124. | Changing numbers: Addition/subtraction using negative integers | |
125. | Changing numbers: Addition/subtraction using negative integers | |
126. | Changing numbers: Addition/subtraction using negative integers | |
127. | Make 20 13+-6+* | |
128. | Make 15 3+19+* | |
129. | Make 10 8+7+* | |
130. | Make 20 8+-2+* | |
131. | Make 15 21+-6+* | |
132. | T/F double sided eqn incl -ive # | |
133. | T/F double sided eqn incl -ive # | |
134. | T/F double sided eqn incl -ive # | |
135. | T/F double sided eqn incl -ive # | |
136. | T/F double sided eqn incl -ive # | |
137. | Add these three numbers: 13+-7+3 | |
138. | Add these three numbers: 9+2+-3 | |
139. | Add these three numbers: 9+8+-5 | |
140. | Add these three numbers: 16+-9+2 | |
141. | Add these three numbers: 20+-9+11 | |
142. | Number detectives: Add 4 clustered hundreds numbers | |
143. | Number detectives: Add 4 clustered hundreds numbers | |
144. | Number detectives: Add 4 clustered hundreds numbers | |
145. | Number detectives: Add 4 clustered hundreds numbers | |
146. | Number detectives: Add 4 clustered hundreds numbers | |
147. | Adding the big ones: Write missing numbers in vertical addition | |
148. | Adding the big ones: Write missing numbers in vertical addition | |
149. | Adding the big ones: Write missing numbers in vertical addition | |
150. | Adding the big ones: Write missing numbers in vertical addition | |
151. | Adding the big ones: Write missing numbers in vertical addition | |
152. | And a Partridge in a pear tree 12+11+10+9, etc | |
153. | Make 13 18+34+* | |
154. | Make -5 27+9+* | |
155. | Make 29 37+20+* | |
156. | Make -8 42+16+* | |
157. | Make 32 29+12+* | |
158. | T/F Double-sided equations | |
159. | T/F Double-sided equations | |
160. | T/F Double-sided equations | |
161. | T/F Double-sided equations | |
162. | T/F Double-sided equations | |
163. | Add these three numbers 84+-11+-16 | |
164. | Add these three numbers -19+55+-26 | |
165. | Add these three numbers -17+-28+34 | |
166. | Add these three numbers -41+-35+47 | |
167. | Add these three numbers 46+13+14 | |
168. | Detective Duck: Add 4 clustered numbers | |
169. | Detective Duck: Add 4 clustered numbers | |
170. | Detective Duck: Add 4 clustered numbers | |
171. | Detective Duck: Add 4 clustered numbers | |
172. | Detective Duck: Add 4 clustered numbers | |
173. | Adding the big ones: Write missing numbers in vertical additions | |
174. | Adding the big ones: Write missing numbers in vertical additions | |
175. | Adding the big ones: Write missing numbers in vertical additions | |
176. | Adding the big ones: Write missing numbers in vertical additions | |
177. | Adding the big ones: Write missing numbers in vertical additions | |
178. | Make 29: 282 + -184 + * | |
179. | Make 180: 369 + -75 + * | |
180. | Make 126: 34+81 + * | |
181. | Make 79: 104 + -53 + * | |
182. | Make 115: -26 + 180 + * | |
183. | Add 3 numbers: 106 + 24 + -6 | |
184. | Add 3 numbers: -72 + 203 + -16 | |
185. | Add 3 numbers: -58 + -245 + 10 | |
186. | Add 3 numbers: -158 + 101 + 69 | |
187. | Add 3 numbers: -36 + -72 + 17 | |
188. | Four's no chore: Add 4 clustered numbers | |
189. | Four's no chore: Add 4 clustered numbers | |
190. | Adding the big ones: Write missing numbers in vertical addition | |
191. | Adding the big ones: Write missing numbers in vertical addition | |
192. | Adding the big ones: Write missing numbers in vertical addition | |
193. | Adding the big ones: Write missing numbers in vertical addition | |
194. | Adding the big ones: Write missing numbers in vertical addition | |
195. | Take Tens 541-60=481,924-90=834 | |
196. | Take Tens 874-80=481,219-20=199 | |
197. | Take Tens 603-10=593,128-50=78 | |
198. | Take Tens 459-70=389,816-40=776 | |
199. | Take Tens 352-70=282,715-30=685 | |
200. | Give or Take Thousands: 260 000 - 5000 | |
201. | Give or Take 1000: 1280000 - 4000 = 1276000 | |
202. | Give or Take Thousands: 22 000 - 3000 | |
203. | Give or Take Thousands: 24 000 - 6000 | |
204. | Give or Take Thousands: 15 500 - 2000 | |
205. | Give or Take Thousands: 12 000 - 1200 | |
206. | 1000s crossing: 5030-4990, 3010-2950, 7970-8040 | |
207. | 1000s crossing: 8020-7940, 4030-3950, 9060-8980 | |
208. | 1000s Crossing: 6015-5999, 8014-7995, 3024-2990 | |
209. | True or False?: 107 - 68 = 41 | |
210. | Same or different: Click all boxes with the answer 126 | |
211. | Same or different: Click all boxes with the answer 175 | |
212. | Same or different: Click all boxes with the answer 426 | |
213. | Same or different: Click all boxes with the answer 146 | |
214. | Same or different: Click all boxes with the answer 236 | |
215. | Same or different: Click all boxes with the answer 567 | |
216. | Same or different: Click all boxes with the answer 194 | |
217. | Same or different: Click all boxes with the answer 222 | |
218. | Same or different: Click all boxes with the answer 468 | |
219. | Same or different: Click all boxes with the answer 673 |