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GCSE Edexcel Maths: Number Part 1 Questions & Answers

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What are Upper and lower bounds? - ANSWERSA measure of accuracy. They show you the margin of error in calculations. Example: - ANSWERSThe length of a calculator is 16cm, to the nearest centimetre. This is a rounded measurement. Its actual length could be half a unit (0.5cm) more or less than the rounded figure, that is, between 15.5cm and 16.5cm. What are Error Intervals? - ANSWERSSometimes a value is given with an error interval. - add the error interval to find the maximum possible value - subtract the error interval to find the minimum possible value. A) 64cm measured to the nearest cm. Find the lower and Upper bounds - ANSWERSUpper bound = 64.5 Lower bound =63.5cm 1cm/2 = 0.5cm

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GCSE Edexcel Maths: Number Part 1
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GCSE Edexcel Maths: Number Part 1

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  • what are error intervals
  • gcse edexcel maths number part 1 questions answ
  • gcse edexcel maths number part 1 stuvia
  • what are upper and lower bounds

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GCSE Edexcel Maths: Number Part 1
Questions & Answers

INTRODUCTION TO BOUNDS - ANSWERS


What are Upper and lower bounds? - ANSWERSA measure of accuracy. They show
you the margin of error in calculations.

Example: - ANSWERSThe length of a calculator is 16cm, to the nearest centimetre.
This is a rounded measurement. Its actual length could be half a unit (0.5cm) more or
less than the rounded figure, that is, between 15.5cm and 16.5cm.

What are Error Intervals? - ANSWERSSometimes a value is given with an error interval.

- add the error interval to find the maximum possible value
- subtract the error interval to find the minimum possible value.

A) 64cm measured to the nearest cm.
Find the lower and Upper bounds - ANSWERSUpper bound = 64.5
Lower bound =63.5cm

1cm/2 = 0.5cm
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