Mathematics Assessment (CfE) - Level 3
I can round a number using an appropriate degree of accuracy,
having taken into account the context of the problem.
(MNU 3 - 01a)
1.
Round each of the following to 1 decimal place :–
a
3·87
b
0·972.
2.
Round each of the following to 2 decimal places :–
a
0·4565
b
2·996.
3.
Round each of the following to 3 decimal places :–
a
11·0955
b
0·9998.
4.
Round each of the following to 1 significant figure :–
a
1609
b
23 789.
5.
Round each of the following to 2 significant figures :–
a
0·078 32
b
147 632.
6.
Round each of the following to 3 significant figures :–
a
70 153
b
0·060 751 2.
7.
How many significant figures has each of the following numbers been rounded to ?
a
8.
9.
0·010
For each calculation below :–
b
0·040 01
c
8004.
(i)
Round each number to one significant figure.
(ii)
Give an approximate answer to each calculation.
a
199 x 19
b
3656 x 196
c
39 x 409
d
8705 ÷ 33
e
416 876 ÷ 3781
f
4489 ÷ 8091.
b
1 significant figure.
The crowd at an Old Firm match was recorded as 57 396.
Round this to :-
a
3 significant figures
10. The distance from Edinburgh Airport to Dubai airport is 5800 km, to 2 significant figures.
What is the smallest possible distance in kilometres between the two cities ?
11. A lottery prize of £5 873 264 was won by a syndicate consisting of 27 workers.
Approximately, how much was each person’s share ?
12. A large truck carries 21 containers.
In each container there are 96 boxes.
In each box there are 48 packets of sweets.
Each packet has 9 sweets.
Estimate, to one significant figure, how many sweets there are in the truck ?
©TeeJay Publishers Feb 2011
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Level 3 MNU 3-01a