This study notes covers Worked Example 1 within Bounds & Error Intervals for GCSE Mathematics. Revise Bounds & Error Intervals in Number for GCSE Mathematics with 14 exam-style questions and 5 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 7 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 4 of 7
Practice
14 questions
Recall
5 flashcards
Worked Example 1
A length is 4.7 m correct to 1 decimal place. Write down the error interval.
Step 1 Find half the accuracy
1 d.p. means accuracy of 0.1 m
Half = 0.05 m
Step 2 Calculate bounds
LB = 4.7 − 0.05 = 4.65
UB = 4.7 + 0.05 = 4.75
Step 3 Write error interval
4.65 ≤ length < 4.75
Keep building this topic
Read this section alongside the surrounding pages in Bounds & Error Intervals. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Bounds & Error Intervals
A length is 240 cm to the nearest 10 cm. What is the lower bound of the length?
A mass m is 45 kg to the nearest kilogram. Write down the error interval for m using inequality notation.
Quick Recall Flashcards
14 questions on Bounds & Error Intervals — practise free
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