Access 3
Homework
Exercise 9.1
1.
2.
Chapter 9
Everyday
Calculations
You will need a calculator.
a
Ava earns £6·45 per hour. How much does she earn in 9 hours ?
b
Tam earns £47·50 per day. How much does he earn in 5 days ?
c
Gus earns £367·25 per week. How much does he earn in 12 weeks ?
d
Ellie earns £36 600 a year. How much does she earn each month ?
a
A taxi travels 560 miles on 40 litres of petrol.
How far does it travel per litre ?
b
A taxi charges £12·75 for a 15 kilometre fare.
How much does it cost per kilometre ?
3.
Jake buys 5 ties at £7·75 each and 4 shirts at £19·95 each.
What change will he get from six £20 notes ?
Exercise 9.2
1.
2.
You will need a calculator for this exercise.
a
Five blank DVD’s cost £1·55. How much would it cost for one DVD ?
b
Eight tropical fish costs £118. What is the cost per fish ?
c
Nine computers cost £4302. How much does each computer cost ?
a
Adsa carrots cost £1·26 for 3 kg. Tecso charges £1·64 for a 4 kg bag.
Which shop is cheaper for carrots and by how much ?
b
Josh earns £22 788 per year, Katie earns £1904 per month.
Who earns more money each month and by how much ?
3.
Jed bought 600€ for £400 on his trip to Italy.
Alix bought 725€ for £500 on her trip to Italy.
a
How many Euro’s, €, did each of them get for each £1.
b
Who got the better deal ? (Explain your answer).
©TeeJay Publishers 2008
page 27
Access 3 - Ch 9 - Everyday Calculations (x / ÷)
Exercise 9.3
1.
Round each of these to the nearest centimetre :–
a
2.
20·6 cm
c
5·5 cm
d
99·4 cm
e
0·9 cm.
12·6 mm
b
19·5 ml
c
0·71 km
d
99·6 kg
e
1·99 ml.
d
£0·505
e
£99·999.
Round each of these to the nearest pence :–
a
4.
b
Round each of these to the nearest whole unit :a
3.
3·8 cm
£12·261
b
£9·678
c
£20·195
3 identical cakes weigh a total of 2765 g.
Find the weight of each cake to the nearest gram.
Exercise 9.4
1.
Shown is the sketch of a kitchen wall.
a
b
2.
3.
You may use a calculator here.
How many tiles would
you need for 1 row
across the way ?
30 cm
390 cm
30 cm
How many tiles would you
need to cover the whole wall ?
90 cm
The tiles in question 1 can be bought in packs of 10 for £12·50 per pack.
a
If you can only buy full packs, how many packs would you need to buy ?
b
How much would it cost in total ?
This wall shown has larger tiles.
Tiles can only be bought in
full packs of 10 and costs
£15·25 per pack.
40 cm
440 cm
40 cm
120 cm
Find the cost of tiling this wall.
4.
When tiling a wall, usually you need to cut tiles around corners or electrical sockets.
Why do you think you should always order more tiles than you actually need ?
©TeeJay Publishers 2008
page 28
Access 3 - Ch 9 - Everyday Calculations (x / ÷)
Revision Exercise
1.
a
Chuck earns £8·26 per hour. How much would he earn in 5 hours ?
b
Elsie earns £42·60 in 6 hours. How much does she earn in one hour ?
2.
Al earns £1976 every 2 months. How much does he earn in one year ?
3.
VEGI-SHOP sell potatoes at £4·50 for a 5 kg bag.
Tatties4U sell them in 4 kg bags for £3·80.
Which is the better buy ? Explain your answer.
4.
Round each of these measurements to the nearest whole unit :–
a
5.
2·7 cm
b
13·09 kg
c
39·5 kW
d
40·91 ml
e
9·9 g.
Six cans of cola costs £2·58. Find the cost per can to the nearest pence.
Extension for Ex 9.4
1.
20 cm
A kitchen wall has dimensions as shown.
20 cm
The tiles measure 20 cm by 20 cm.
• Full packs must be purchased.
• They come in packs of 10 tiles.
• They cost £16 per pack.
180 cm
a
How many tiles 20 cm by 20 cm
are needed to tile the wall ?
b
How many packs should be ordered ?
c
What would be the total cost of buying the tiles ?
300 cm
2.
This time, find the cost of tiling the wall area using 30 cm by 30 cm tiles
which cost £34 per pack (again they are in packs of 10).
3.
a
How much cheaper is it to use the 30 cm by 30 cm tiles ?
b
Difficult ! Explain why would you might still decide to go with the 20 cm
by 20 cm tiles.
©TeeJay Publishers 2008
page 29
Access 3 - Ch 9 - Everyday Calculations (x / ÷)