ACMNA099
Use estimation and rounding to check the reasonableness of answers to calculations
1. | About Half: 615 89 58 915 | |
2. | About Half: 780 390 96 1080 | |
3. | About Half: 63 585 789 6232 | |
4. | About Half: 62 585 4112 38 120 6258 | |
5. | About Half: 89 590 926 17 680 1834 | |
6. | About Half: 67 899 77 020 7020 8199 | |
7. | About Half: 59 730 53 030 5020 5902 | |
8. | About Half: 42 289 48 928 409 4120 | |
9. | About Half: 34 008 21 119 1987 3369 | |
10. | Round to the nearest 1000: 2689 1500 6999 | |
11. | Round to the nearest 1000: 1001 1999 4050 | |
12. | Round to the nearest 1000: 4698 6010 4449 | |
13. | Round to the nearest 1000: 1501 1499 1999 | |
14. | Round to the nearest 1000: 8750 2496 5671 | |
15. | Rounding to nearest 100: 258 840 686 | |
16. | Rounding to nearest 100: 251 949 670 | |
17. | Rounding to nearest 100: 43 450 699 | |
18. | Rounding to nearest 100: 899 159 378 | |
19. | Rounding to nearest 100: 60 116 161 | |
20. | Round to the nearest 100: 287, 957, 793 | |
21. | Round to the nearest 100: 951, 450, 1698 | |
22. | Round to the nearest 100: 1598, 1450, 1499 | |
23. | Round to the nearest 100: 18 420, 69 510, 77 352 | |
24. | Round to the nearest 100: 105 248, 398 429, 367 950 | |
25. | Round to the nearest 1000: 125 369, 425 877, 786 357 | |
26. | Round to the nearest 1000: 598 635, 459 352, 987 201 | |
27. | Round to the nearest 1000: 598 258, 952 698, 169 999 | |
28. | Round to the nearest 1000: 369 247, 987 365, 654 589 | |
29. | Round to the nearest 1000: 654 741, 321 123, 696 969 | |
30. | Round to the nearest 1000: 987 523, 659 137, 498 951 | |
31. | Round to nearest 10 000: 12 589 35 698 45 100 | |
32. | Round to nearest 10 000: 16 258 11 100 65 196 | |
33. | Round to nearest 10 000: 15 369 85 587 78 444 | |
34. | Round to nearest 100 000: 102 258 698 012 258 369 | |
35. | Round to nearest 10 000: 654 321 128 259 439 636 | |
36. | Round to nearest 1000: 12 211 36 950 104 401 | |
37. | Round to nearest 1000: 28 650 10 070 19 01 | |
38. | Round to nearest 1000: 4450 4550 9500 | |
39. | Round to the nearest 10 000: 14 602 32 987 57 704 | |
40. | Round to the nearest 10 000: 11 450 19 101 56 852 | |
41. | Round to nearest 10 000: 112 369 419 837 665 789 | |
42. | Round to nearest 10 000: 232 697 148 693 945 500 | |
43. | Round to nearest 100 000: 1 159 362 4 379 258 8 402 928 | |
44. | Round to nearest 100 000: 4 787 255 1 659 345 5 426 899 | |
45. | Round to nearest 100 000: 8 789 025 2 458 023 1 367 528 | |
46. | Round to nearest 10 000: 24 589 325 002 164 997 | |
47. | Round to nearest 100 000: 2 050 006 3 545 683 4 009 045 | |
48. | Round to nearest 10 000: 4 542 125 5 552 369 7 769 582 | |
49. | Round to nearest 10 000: 6 564 287 2 319 279 477 021 | |
50. | Round to nearest 100 000: 3 469 125 7 782 425 2 372 158 | |
51. | An apple a day: 1000 / 160 | |
52. | On the Road: 95 x 4 | |
53. | Christmas Greetings: How many 45c stamps from $1 | |
54. | Up or Down: How many whole groups of 10 in 24? | |
55. | Up or down: How many 2m streamers from 9m of ribbon | |
56. | Up or down: 11 kg / 3kg | |
57. | Up or down: 10 cups / 4 cups | |
58. | Up or down: 40 / 15 | |
59. | Up or down: 7kg / 5kg | |
60. | Up or Down - 555/55 | |
61. | Up or Down | |
62. | Up or Down - 8 | |
63. | Up or Down - 9 | |
64. | Up or Down: | |
65. | Up or down 56/10 | |
66. | Up or down 290/60 | |
67. | Up or down 500/60 | |
68. | Up or down 430/50 | |
69. | Up or down 27/5 | |
70. | Up or down: 100 / 40 | |
71. | Up or down: 1600 / 250 | |
72. | Up or down: 42/5 | |
73. | Up or Down: 44/8 | |
74. | Up or Down: 23/6 | |
75. | Up or Down: 83/9 | |
76. | Up or down 39/15 | |
77. | Up or down: Decide whether to round up or down after division | |
78. | Up or down: Decide whether to round up or down after division | |
79. | About to divide: Click the best estimate of the answer | |
80. | Up or down: Decide whether it is sensible to round up or down after division | |
81. | Up or down: Decide whether it is sensible to round up or down after division | |
82. | Bill's Buckets - match appropriate bucket size to required volume | |
83. | Bill's Buckets - rounding up to nearest litre | |
84. | Bill's Buckets - rounding up to nearest litre | |
85. | Round About 1 - rounding to nearest 10cm | |
86. | Size It Up 6 - select best estimate for height of a giraffe | |
87. | The Great Measurement Round-Up 3 - round m to nearest km | |
88. | The Great Measurement Round-Up 2 - round cm to nearest m | |
89. | The Great Measurement Round-Up 1 - round mm to nearest cm | |
90. | Around About... - rounding g to the nearest kg | |
91. | Around About... - rounding to the nearest kg | |
92. | Around About... - rounding g to the nearest kg | |
93. | Up or Down: 36 people at 15 per turn | |
94. | Up or Down: 5 meringues x 5 egg whites = How many dozen eggs? | |
95. | Up or Down: How many whole 30cm lengths in 1m? | |
96. | Up or Down: (170 + 10) / 50 | |
97. | Up or Down: $75 / 20 | |
98. | Up or Down - 3 (1) | |
99. | Rounding - Round to 10: 268 | |
100. | Rounding - Round to 100: 62 | |
101. | Rounding - Round to 100: 350 | |
102. | Rounding - Round to 10: 902 | |
103. | Rounding - Round to 10: 99 | |
104. | Rounding - Round to 10: 705 | |
105. | Round and round we go: Round 2dp to a whole number | |
106. | Rounding - Round to 100: 68 | |
107. | Rounding - Round to 100: 911 | |
108. | Rounding - Round to 100: 345 | |
109. | Rounding - Round to 100: 438 | |
110. | Rounding - Round to 100: 691 | |
111. | Rounding - Round to 100: 224 | |
112. | Rounding - Round to 100: 749 | |
113. | Rounding - Round to 100: 198 | |
114. | Rounding - Round to 100: 850 | |
115. | Rounding - Round to the nearest whole number: 288.8 | |
116. | Rounding - Round to 100: 572 | |
117. | Rounding - Round to the nearest whole number: 100.4 | |
118. | Rounding - Round to the nearest whole number: 165.1 | |
119. | Rounding - Round to the nearest whole number: 59.5 | |
120. | Rounding - Round to the nearest whole number: 24.9 | |
121. | See You Round: Round to the nearest thousand: 1945 | |
122. | See You Round: Round to the nearest thousand: 57501 | |
123. | See You Round: Round to the nearest thousand: 18011 | |
124. | See You Round: Round to the nearest thousand: 6399 | |
125. | See You Round: Round to the nearest thousand: 3721 | |
126. | See You Round: Round to the nearest thousand: 31948 | |
127. | See You Round: Round to the nearest thousand: 22586 | |
128. | See You Round: Round to the nearest thousand: 9387 | |
129. | See You Round: Round to the nearest thousand: 7319 | |
130. | See You Round: Round to the nearest thousand: 4747 | |
131. | See You Round: Round to the nearest ten thousand: 25627 | |
132. | See You Round: Round to the nearest ten thousand: 573882 | |
133. | See You Round: Round to the nearest ten thousand: 1789 790 | |
134. | See You Round: Round to the nearest thousand: 43 209 | |
135. | See You Round: Round to the nearest hundred thousand: 1824781 | |
136. | See You Round: Round to the nearest ten thousand: 5 293 174 | |
137. | See You Round: Round to the nearest hundred thousand: 722156 | |
138. | See You Round: Round to the nearest hundred thousand: 250 987 | |
139. | About Half: 902 394 | |
140. | About Half: 303 406 | |
141. | About Half: 797 196 | |
142. | About Half: 501 297 | |
143. | About Half: 97 607 | |
144. | About Half: 2009 6992 | |
145. | About Half: 6978 4012 | |
146. | About Half: 8019 998 | |
147. | About Half: 4975 3006 | |
148. | About Half: 1997 6011 | |
149. | About Half: 7007.9 2986.2 | |
150. | About Half: 7991.6 5015.8 | |
151. | About Half: 2010.7 8979.5 | |
152. | About Half: 3999.1 9027.4 | |
153. | About Half: 1003.3 5985.7 | |
154. | About Half: 1979.6 6005.1 | |
155. | About Half: 4015.9 1998.1 | |
156. | About Half: 3002.5 8978.5 | |
157. | About Half: 19 837.91, 70 011.09 | |
158. | About Half: 30 198.11, 89 997.23 | |
159. | About Half: 59 763.25, 40 289.37 | |
160. | See You Round: Round to the nearest thousand: 602 | |
161. | See You Round: Round to the nearest ten: 4018 | |
162. | See You Round: Round to the nearest hundred: 5747 | |
163. | See You Round: Round to the nearest thousand: 4503 | |
164. | Round and round we go: Round 2dp to a whole number | |
165. | Round and round we go: Round 2dp to a whole number | |
166. | Round and round we go: Round 2dp to a whole number | |
167. | Round and round we go: Round 2dp to a whole number | |
168. | Round to the nearest 100: 453 665, 399 655, 290 099 | |
169. | Round to the nearest 1000: 870 560, 499 975, 533 245 | |
170. | Round to the nearest 100: 234 567, 123 456, 345 678 | |
171. | Round to the nearest 10 000: 113 455, 384 990, 438 003 |