Mathematics A-Level
recurring decimals
What recurring decimals means in Mathematics A-Level, as defined for WJEC.
Definition of recurring decimals
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Read the wording for your board, then hide it and explain recurring decimals in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
These can be evaluated as infinite geometric series, for example 0.454545... is the sum of a series with first term a = 0.45 and common ratio r = 0.01.
Topics that use recurring decimals
- Sequences and Series (A2 Unit 3: Pure Mathematics B) (WJEC A-Level)
Related terms
- Arithmetic sequence
- binomial approximation
- common difference
- compound growth and depreciation
- Convergent geometric series
- Geometric sequence
- infinite binomial series
- linearity of summation
Using recurring decimals in the exam
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