ACMNA128
Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers
1. | 0.1 less, 0.1 more than 42.6 | |
2. | 0.1 less, 0.1 more than 98.1 | |
3. | 0.1 less, 0.1 more than 71.9 | |
4. | 0.1 less, 0.1 more than 85.3 | |
5. | 0.1 less, 0.1 more than 19.9 | |
6. | 0.1 less, 0.1 more than 40 | |
7. | 0.1 less, 0.1 more than 22 | |
8. | 0.1 less, 0.1 more than 25.5 | |
9. | 0.1 less, 0.1 more than 33.8 | |
10. | 10 less, 0.1 more than 80.1 | |
11. | 0.1 less, 0.1 more than 50.1 | |
12. | 0.1 less, 0.1 more than 42.9 | |
13. | 0.1 less, 0.1 more than 28.5 | |
14. | 0.1 less, 0.1 more than 82 | |
15. | 0.1 less, 0.1 more than 99 | |
16. | 0.1 less, 0.1 more than 99.9 | |
17. | Round to the nearest whole number: 25.61 39.42 96.91 | |
18. | Round to the nearest whole number: 95.11 42.34 64.24 | |
19. | Round to the nearest whole number: 65.95 45.76 63.77 | |
20. | Juggling Hundredths: One hundredth less than 100 | |
21. | Juggling Hundredths: one hundredth less than 1000 | |
22. | Juggling Hundredths: eight hundredths less than 100 | |
23. | Juggling Hundredths: seven hundredths less than 78 | |
24. | Juggling Hundredths: 23 - 0.15 | |
25. | Juggling Hundredths: 13 + 0.96 | |
26. | Juggling Hundredths: 26 + 100 hundredths | |
27. | Juggling Hundredths: 54 hundredths more than 45 | |
28. | Changing Numbers: 8.1 +1.1, +11.1, x 0.1, x10 | |
29. | Changing Numbers: 9.2 + 0.1, +101, x 0.1, x10 | |
30. | Changing Numbers: 6.2 +1, +10, x 0.1, X100 | |
31. | Changing Numbers: 5.5 x 1, x 10, x 10, x 100 | |
32. | Changing Numbers: 4.3 +10, - 0.1, x 10, x 100 | |
33. | Changing Numbers: 16.4 +1, +10.1, x 0.1, x10 | |
34. | Changing Numbers: 85.3 + 0.1, +1, x 0.1, x100 | |
35. | Changing Numbers: 25.46 x10, x.01, +1010, ÷0.1 | |
36. | Changing Numbers: 12.64 x10, x0.1, +100.1, +11.1 | |
37. | Changing Numbers: 110.53 x 0.01,+11.1, +1.1, ÷ 0.1 | |
38. | Changing Numbers: 27.43 +11.1, +1.01, x10, x0.1 | |
39. | Changing Numbers: 33.25 x10, +11.1, +1.1, ÷0.1 | |
40. | Changing Numbers: 61.36 x10, x 0.1, +10.01, ÷0.01 | |
41. | Changing Numbers: 79.81 x 0.1, x100, +101, +0.1 | |
42. | Changing Numbers: 58.32 x 100, + 10.1, - 0.01, ÷10 | |
43. | Changing Numbers: 83.56 x10, +11, +1.1, ÷ 10 | |
44. | Movin' One Up! 0.7+?=1 | |
45. | Scoring decimal points: 19.3+2.3=*1.* | |
46. | Scoring decimal points: *3.6+*.2=25.* | |
47. | Scoring decimal points: 1*.2+2.7=*9.* | |
48. | Scoring decimal points: 1*.*+2.5=*0.8 | |
49. | Scoring decimal points: 2*.2+1.5=*7.* | |
50. | Use The pattern 1.4+1.5, 10.4+10.5, 104+105 | |
51. | Use The pattern 1.2+1.7, 10.2+10.7, 102 107 | |
52. | Use The pattern 1.4+1.4, 10.4+10.4, 104+104 | |
53. | Use The pattern 1.2+1.3, 10.2+10.3, 102+103 | |
54. | Use The pattern 1.2+1.4, 10.2+10.4, 102+104 | |
55. | Fiona's day out | |
56. | Scoring Decimal Points: Complete vertical algorithm | |
57. | Scoring Decimal Points: Complete vertical algorithm | |
58. | Scoring Decimal Points: Complete vertical algorithm | |
59. | Scoring Decimal Points: Complete vertical algorithm | |
60. | Scoring Decimal Points: Complete vertical algorithm | |
61. | Decimals get together: 6.7+?=10 | |
62. | Decimals get together: 5.8+4.2=? | |
63. | Decimals get together: ?+3.7=10 | |
64. | Add it up decimals: 26.7+5.4 | |
65. | Add it up decimals: 56.7+7.6 | |
66. | Add it up decimals:64.6+8.9=73.5 | |
67. | Add it up decimals: 36.5+7.9 | |
68. | Add it up decimals: 69.4+7.7 | |
69. | Ten up: What must be added to 62.3 to make 70? | |
70. | Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp | |
71. | Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp | |
72. | Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp | |
73. | Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp | |
74. | Adding decimals: Write missing numbers in vertical addition of 2-digit numbers with 1 dp | |
75. | Add it up: Addition of decimal numbers with regrouping | |
76. | Add it up: Addition of decimal numbers with regrouping | |
77. | Add it up: Addition of decimal numbers with regrouping | |
78. | Add it up: Addition of decimal numbers with regrouping | |
79. | Add it up: Addition of decimal numbers with regrouping | |
80. | Number detectives mystery decimals: 0.02+?, 0.26+?, 0.44+?=1 | |
81. | Number detectives mystery decimals: 0.33+?, 0.62+?, 0.84+?=1 | |
82. | Number detectives mystery decimals: 0.08+?, 0.15+?, 0.73+?=1 | |
83. | Number detectives mystery decimals: 0.29+?, 0.82+?, 0.06+?=1 | |
84. | Number detectives mystery decimals: 0.45+?, 0.01+?, 0.22+?=1 | |
85. | Ten Up 57.81 to 60 | |
86. | Ten Up 63.72 to 70 | |
87. | Ten Up 46.98 to 50 | |
88. | Ten Up 22.56 to 30 | |
89. | Ten Up 15.32 to 20 | |
90. | Ten Up 133.36 to 140 | |
91. | Ten Up 165.83 to 170 | |
92. | Ten Up 132.64 to 140 | |
93. | Ten Up 113.95 to 120 | |
94. | Ten Up 188.66 to 190 | |
95. | Scoring Decimal Points: 2*.*+14.9 = *8.5 | |
96. | Decimal Dropouts : Decimal hundredths totalling 1 | |
97. | Decimal Dropouts : Decimal hundredths totalling 1 | |
98. | Decimal Dropouts : Decimal hundredths totalling 1 | |
99. | Decimal Dropouts : Decimal hundredths totalling 1 | |
100. | Decimal Dropouts : Decimal hundredths totalling 1 | |
101. | Scoring Decimal Points: *2.4* + 9.*0 = 4*.09 | |
102. | Scoring Decimal Points: *4.34 + 7*.0* = 93.*1 | |
103. | Scoring Decimal Points: 7.5* + *.*0 = *2.46 | |
104. | Scoring Decimal Points: 4.*6 + 3.1* = *.08 | |
105. | Scoring Decimal Points: 8.6* + *.91 = 11.*3 | |
106. | Scoring Decimal Points: 7.4* + *.68 = 11.*1 | |
107. | Scoring Decimal Points: *.16 + 7.9* = 10.*1 | |
108. | Scoring Decimal Points: 4.61 + 6.*3 = **.4* | |
109. | Add it up 148.82+76.59 | |
110. | Add it up 137.87+28.95 | |
111. | Add it up 146.29+11.72 | |
112. | Add it up 237.27+23.91 | |
113. | Add it up 348.26+56.32 | |
114. | Changing numbers 2.351 add 0.3, 0.003, 0.03 | |
115. | Changing numbers 5.391 add 4, 0.004, 0.4 | |
116. | Changing numbers 4.345 add 0.004, 40, 0.04 | |
117. | Changing numbers 1.221 Add 0.7, 0.07, 7.007 | |
118. | Changing numbers 3.539 add 0.001, 1.1, 1.01 | |
119. | Add these three numbers 6.2+1.6+7.2 | |
120. | Add these three numbers 4.8+5.2+8.7 | |
121. | Add these three numbers 2.5+9.5+2.7 | |
122. | Add these three numbers 7.3+1.7+8.1 | |
123. | Add these three numbers 3.3+2.5+2.7 | |
124. | Scoring decimal points: Write the missing numbers in vertical decimal addition | |
125. | Scoring decimal points: Write the missing numbers in vertical decimal addition | |
126. | Scoring decimal points: Write the missing numbers in vertical decimal addition | |
127. | Scoring decimal points: Write the missing numbers in vertical decimal addition | |
128. | Scoring decimal points: Write the missing numbers in vertical decimal addition | |
129. | Hundredths crossing: Add/subtract crossing a tenths/whole number bound | |
130. | Hundredths crossing: Add/subtract crossing a tenths/whole number bound | |
131. | Hundredths crossing: Add/subtract crossing a tenths/whole number bound | |
132. | Hundredths crossing: Add/subtract crossing a tenths/whole number bound | |
133. | Hundredths crossing: Add/subtract crossing a tenths/whole number bound | |
134. | Hundredths crossing 69.39+6.38 | |
135. | Hundredths crossing 79.33+5.99 | |
136. | Hundredths crossing 37.22+6.37 | |
137. | Hundredths crossing 156.54+6.77 | |
138. | Hundredths crossing 49.22+0.87 | |
139. | Decimal Drops: 27.* - 15.3 = 1*.3 | |
140. | Decimal Drops: 63.* - 4*.6 = *2.2 | |
141. | Decimal Drops: 54.* - 37.7 = *7.1 | |
142. | Decimal Drops: 48.8 - 2*.* = *9.5 | |
143. | Decimal Drops: 81.4 - 22.* = *9.2 | |
144. | Spot the Difference: Write the difference between 3 number pairs | |
145. | Spot the Difference: Write the difference between 3 number pairs | |
146. | Spot the Difference: Write the difference between 3 number pairs | |
147. | Spot the Difference: Write the difference between 3 number pairs | |
148. | Spot the Difference: Write the difference between 3 number pairs | |
149. | Tenths Crossing: 40.4-0.5, 63.5-0.6, 30.6-0.7 | |
150. | Tenths Crossing: 20.2-0.4, 37.7-0.9, 17.5-0.9 | |
151. | Tenths Crossing: 26.5-0.8, 55.5-0.9, 74.3-0.7 | |
152. | Tenths Crossing: 44.4-0.8, 38.6-0.7, 23.2-0.5 | |
153. | Tenths Crossing: 88.5-0.8, 65.3-0.5, 43.6-0.9 | |
154. | Scoring Decimal Points: Complete vertical algorithm | |
155. | Scoring Decimal Points: Complete vertical algorithm | |
156. | Scoring Decimal Points: Complete vertical algorithm | |
157. | Scoring Decimal Points: Complete vertical algorithm | |
158. | Scoring Decimal Points: Complete vertical algorithm | |
159. | Mysteries of 20: Decimals | |
160. | Mysteries of 20: Decimals | |
161. | Mysteries of 20: Decimals | |
162. | Mysteries of 20: Decimals | |
163. | Mysteries of 20: Decimals | |
164. | Use the Pattern: Subtract (16-.3)(160-3)(1600-30) | |
165. | Use the Pattern: Subtract (15-0.1)(150-1)(1500-10) | |
166. | Use the Pattern: Subtract (20-0.4)(200-4)(2000-40) | |
167. | Use the Pattern: Subtract (13-.7)(113-7)(1300-70) | |
168. | Use the Pattern: Subtract (17-.5)(170-5)(1700-50) | |
169. | Use the Pattern: Subtract (11-0.6)(110-6)(1100-60) | |
170. | Subtraction Chains: 14.8 -2-0.6-0.1, ?-5=20.4,-0.2-5 | |
171. | Subtraction Chains: ?-3=15.4, -0.1-8, ?-4-0.5-0.2=9.2 | |
172. | Subtraction Chains: ?-4=12.6,-0.5-2, ?-5=15.5,-3-0.2 | |
173. | Subtraction Chains: ?-4=14.7,-0.3-4.4, ?-5=11.9,-0.1-0.7 | |
174. | Subtraction Chains: ?-4.2=11.5,-1.1-3.3, ?-15.5-3-6.5=6 | |
175. | Running the race: Addition and subtraction of distances | |
176. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
177. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
178. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
179. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
180. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
181. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
182. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
183. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
184. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
185. | Scoring Decimal Points: Write missing numbers in vertical addition of decimal numbers | |
186. | Number Detectives: Subtracting decimals | |
187. | Number Detectives: Subtracting decimals | |
188. | Number Detectives: Subtracting decimals | |
189. | Number Detectives: Subtracting decimals | |
190. | Number Detectives: Subtracting decimals | |
191. | Number Detectives: Subtracting decimals | |
192. | Number Detectives: Subtracting decimals | |
193. | Number Detectives: Subtracting decimals | |
194. | Number Detectives: Subtracting decimals | |
195. | Number Detectives: Subtracting decimals | |
196. | Cheetin' Horses: Comparison of speeds in km/hr | |
197. | Thirsty work: Comparison of volumes | |
198. | Crossing the line: Subtracting distances | |
199. | Decimal mysteries 50 -*=11.08,-*=36.15,-*=16.46 | |
200. | Decimal mysteries 50 -*=26.33,-*=37.85,-*=1.07 | |
201. | Decimal mysteries 50 -*=8.28,-*=22.16,-*=32.77 | |
202. | Decimal mysteries 50 -*=21.44,-*=30.53,-*=13.19 | |
203. | Decimal mysteries 50 -*=32.65,-*=13.21,-*=24.17 | |
204. | Spot the difference 493.8&412.6 | |
205. | Spot the difference 248.7&218.3 | |
206. | Spot the difference 759.5&734.1 | |
207. | Spot the difference 695.6&623.2 | |
208. | Spot the difference 176.9&141.5 | |
209. | Decimal Drops: Write the missing numbers in vertical decimal subtractions | |
210. | Decimal Drops: Write the missing numbers in vertical decimal subtractions | |
211. | Decimal Drops: Write the missing numbers in vertical decimal subtractions | |
212. | Decimal Drops: Write the missing numbers in vertical decimal subtractions | |
213. | Decimal Drops: Write the missing numbers in vertical decimal subtractions | |
214. | Scoring decimal points: Write missing numbers in vertical decimal subtractions | |
215. | Scoring decimal points: Write missing numbers in vertical decimal subtractions | |
216. | Scoring decimal points: Write missing numbers in vertical decimal subtractions | |
217. | Scoring decimal points: Write missing numbers in vertical decimal subtractions | |
218. | Scoring decimal points: Write missing numbers in vertical decimal subtractions | |
219. | True/false: Decimal subtraction 2 dp | |
220. | True/false: Decimal subtraction 2 dp | |
221. | True/false: Decimal subtraction 2 dp | |
222. | Scoring decimal points: Write missing numbers in vertical subtractions | |
223. | Scoring decimal points: Write missing numbers in vertical subtractions | |
224. | Spot the Difference: Decimal subtraction calculation 2dp | |
225. | Spot the Difference: Decimal subtraction calculation 2dp | |
226. | It's a long way to the concert: Money addition and multiplication | |
227. | Liquid Maths - half a L jugs to fill 5.5L bucket | |
228. | Sugar High? - adding g to kg, 2 decimal places | |
229. | Up And Up: 1.6+0.7 | |
230. | Up And Up: 1.7+1.1 | |
231. | Up And Up: 1.9+0.3 | |
232. | Up And Up: 1.5+0.4 | |
233. | Up And Up: 1.7+0.4 | |
234. | Up And Up: 11.2+4.5 | |
235. | Up and Up: 13.4+6.3 | |
236. | Movin' One Up! 0.1+?=1 | |
237. | Movin' One Up! 0.5+?=1 | |
238. | Movin' One Up! 0.2+?=1 | |
239. | Movin' One Up! 0.4+?=1 | |
240. | How Much Less? 1.2<2, 15.5<16, 3.8,4? | |
241. | How Much Less? 11.6<12, 13.7<14, 7.5<10? | |
242. | How Much More? 7>6.5, 1>0.2, 10>4.8 | |
243. | How Much More? 20>19.4, 12>11.8, 10>6.5? | |
244. | Up and Up: 74.9+22.6 | |
245. | Up and Up: 52.4+14.8 | |
246. | Up and Up: 33.6+45.5 | |
247. | Up and Up: 64.7+13.5 | |
248. | Movin' On Up! 13.7+?=16 | |
249. | Decimal Descent: 72.6-31.3 | |
250. | Decimal Descent: 46.7-11.3 | |
251. | Decimal Descent: 54.3-22.1 | |
252. | Up and Up: 15.2+3.9 | |
253. | Up and Up: 11.8+6.5 | |
254. | Up and Up: 13.6+4.7 | |
255. | Up and Up: 14.4+2.8 | |
256. | Up and Up: 10.9+5.3 | |
257. | Decimal Descent: 21.7-6.8 | |
258. | Decimal Descent: 34.2-6.5 | |
259. | Decimal Descent: 11.3-8.7 | |
260. | Decimal Descent: 40.6-8.7 | |
261. | Decimal Descent: 64.5-5.8 | |
262. | Up and Up: 76.04+9.09 | |
263. | Up and Up: 24.92+3.26 | |
264. | Up and Up: 65.39+6.21 | |
265. | Up and Up: 28.21+0.81 | |
266. | Up and Up: 13.45+7.05 | |
267. | Decimal Descent: 45.99-1.71 | |
268. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
269. | Decimal Descent: 7.63-1.51 | |
270. | Decimal Descent: 25.54-5.1 | |
271. | Decimal Descent: 63.83-3.93 | |
272. | Decimal Descent: 17.62-16.51 | |
273. | Decimal Descent: 37.97-2.97 | |
274. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
275. | Decimal Descent: 25.73-2.8 | |
276. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
277. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
278. | Decimal Descent: 153-151.5 | |
279. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
280. | Decimal Descent: Difference between 2 decimal numbers (same no.dec. plces) | |
281. | Movin' On Up! 13.9+?=16 | |
282. | Movin' On Up! 12.5+?=15 | |
283. | Movin' On Up! 11.2+?=14 | |
284. | Movin' On Up! 15.8+?=18 | |
285. | Up and Up: 11.8+1.9 | |
286. | Up and Up: 13.2+2.9 | |
287. | Up and Up: 10.8+6.8 | |
288. | Up and Up: 12.7+4.4 | |
289. | Up and Up: 13.3+5.8 | |
290. | Decimals get together: 7.6+?=10 | |
291. | Decimals get together: 2.7+7.3=? | |
292. | Decimals get together: ?+1.1=10 | |
293. | Decimals get together: 5.4+?=10 | |
294. | Decimals get together: 4.7+5.3=? | |
295. | Decimals get together: ?+5.7=10 | |
296. | Decimals get together: 3.8+?=10 | |
297. | Decimals get together: 3.4+6.6=? | |
298. | Decimals get together: ?+7.1=10 | |
299. | Decimals get together: 5.9+?=10 | |
300. | Decimals get together: 3.7+6.3=? | |
301. | Decimals get together: ?+6.7=10 | |
302. | Up and Up: 130.45+60.56 | |
303. | Up and Up: 3.8+2.6=? | |
304. | Up and Up: 21.4+4.5=? | |
305. | Up and Up: 13.4+6.3=? | |
306. | Up and Up: 14.4+7.3=? | |
307. | Up and Up: 17.4+6.2=? | |
308. | Up and Up: 16.3+7.5=? | |
309. | Up and Up: 13.4+5.4=? | |
310. | Ten up: What must be added to 34.4 to make 40? | |
311. | Ten up: What must be added to 18.3 to make 20? | |
312. | Ten up: What must be added to 46.5 to make 50? | |
313. | Ten up: What must be added to 26.8 to make 30? | |
314. | Tenths Tournament: 0.5 less than 7.5 | |
315. | Tenths Tournament: 1- 0.6 | |
316. | Tenths Tournament: Take 0.5 from 0.9 | |
317. | Tenths Tournament: 6.9 minus 0.4 | |
318. | Tenths Tournament: 1- 0.5 | |
319. | Tenths Tournament: 8.3 plus 0.2 | |
320. | Tenths Tournament: 1- 0.1 | |
321. | Tenths Tournament: 0.6 more than 5.3 | |
322. | Tenths Tournament: Add 0.4 to 4.3 | |
323. | Tenths Tournament: 1- 0.7 | |
324. | Tenths Tournament: 6.1 + 0.8 | |
325. | Tenths Tournament: 0.1 less than 9.4 | |
326. | Tenths Tournament: Take 0.4 from 1.8 | |
327. | Tenths Tournament: 1- 0.8 | |
328. | Tenths Tournament: 1- 0.2 | |
329. | Crossing the line: Subtracting distances |