Mathematics GCSE
Checking answers by substitution
What Checking answers by substitution means in Mathematics GCSE, as defined for AQA.
Definition of Checking answers by substitution
Check what you remember
Read the wording for your board, then hide it and explain Checking answers by substitution in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Substituting each option back into the power or root to test it, which is faster and safer than estimating when the numbers are small.
Topics that use Checking answers by substitution
- Structure and calculation (AQA GCSE)
Related terms
- Calculating with powers of 10
- Checking for repeats and omissions
- Coefficient
- Conjugate
- Converting between ordinary and standard form
- Counting outcomes in context
- denominator
- equivalent fractions
Using Checking answers by substitution in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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