Exam style questions - Hodder Plus Home

8 Using a
calculator
Here is an exam question …
Work out the following, giving your answers to 2
decimal places.
a 5.6 2 [1]
b
167
24 + 16
[2]
c 2.7 2 + 8.3 2 [2]
d 3 + 5 × 7
[1]
… and its solution
a 31.36
b 4.18
c 76.18
d 6.16
Here is another exam question …
Work out the following. Give your answers correct to 3
significant figures.
a 4.2 4 [1]
b 3 9 2
. + 0 . 53
[2]
3. 9 × 0.
53
c 350 × 1.005 12 [1]
… and its solution
a 311
b 7.61
c 372
Key in
4 . 2 x y 4 =
311.1696
Key in
( 3 . 9 x 2 +
0 . 5 3 )
( 3 . 9 ×
÷
0 . 5 3 ) =
7.614 900 ...
Key in
3 5 0 ×
1 . 0 0 5 x y 1 2
Now try these exam questions
Give your answers to 3 significant figures where
appropriate.
1 Round these numbers to the number of
significant figures shown in the brackets. [5]
a 5678 (2)
b 230 421 (3)
c 0.005 69 (1)
d 0.006 073 8 (4)
e 0.898 (2)
2 Work out these.
a 4 . 2 – 1 . 7
1.
25 2
[2]
2 2
b 5 + 12
[1]
3 Work out these.
a 43% of £640 [2]
b 2 5
of 47.5 m [2]
c 84.6 − 23.9 [2]
4 Work out these.
a
1. 83 – 0.
93
3.
75
[2]
b 4.6 × 5.2 − 17.1 [1]
c 3 . 7 + 2 . 1
4.
8
[1]
5 Work out these.
a 4.31 2 − 1.9 2 [1]
b 8 . 2 – 1 . 7
16.
3 2
[2]
c
2 2
4. 75 – 1. 24
[2]
6 Work out these.
a 4.1 2 [1]
b 9. 63
[1]
c 7.9 − 3.6 × 1.25 [2]
d 3 7
of £164 [2]
7 £1627 is shared equally between five friends.
How much does each one get [2]
8 a A shopkeeper makes a special offer on
fertilizer priced at £3.68. He reduces it by 83p.
What is the new price [2]
b At the garden centre they decide to charge
75% of the original price of £3.68. Whose price
is cheaper and by how much [3]
9 Twelve baking potatoes cost £2.76. How much
would five cost [2]
4
10 John worked out using a calculator and his
2 + 3
answer was 5. Explain what he did wrong. [1]
=
371.587 234 ...
© Hodder Education 2011 Unit C
53