REVISION HOMEWORK
ADOLYGU GWAITH CARTREF
Limits of Accuracy
HIGHER TIER
MARK
Enw: _____________________________
%
Dosbarth:_____________________________
Target
Practise finding the upper and lower bounds
Show all workings to explain your answer
Write down any parts of this topic that you need to improve on:
Target
Practice
1,2,3,4
1,2,3,4
Met
Classwork Questions
1.
2.
[2]
[2]
3.
Square paving stones are manufactured so that the length of each of them is 51cm, measured to the
nearest centimetre.
(a) Write down the least and greatest length of a square paving stone.
Least length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cm Greatest length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cm
[2]
(b) The length of a path is 30·0m, measured correct to the nearest 0·1 of a metre.
Starting at one end of the path, 60 of the paving stones are laid end to end in a straight line along the
path. Explain, showing all your calculations, why the paving stones will always be longer than the path. [5]
4.
[5]
Revision Homework GCSE Questions
1.
2.
[2]
[2]
[2]
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3.
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(i)…………………………………………………………………………………………………………………………………………………………………
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4.
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5.
6.
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Target Practice Questions
1.
2. A tank holds 1800 litres of liquid, correct to 2 significant figures. A bottle holds 60 litres,
correct to the nearest litre. Find the least possible number of bottles needed to completely
fill the tank.
[4]
3.
[4]
4.
[2]
[2]
[2]