Physics A-Level
Addition and subtraction rule
What Addition and subtraction rule means in Physics A-Level, as defined for AQA.
Definition of Addition and subtraction rule
Check what you remember
Read the wording for your board, then hide it and explain Addition and subtraction rule in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
For addition and subtraction, combine the absolute uncertainties by adding them, keeping the unit of the quantity.
Topics that use Addition and subtraction rule
- Limitation of physical measurements (AQA A-Level)
Related terms
- Absolute uncertainty
- Averaging
- Combination of absolute and percentage uncertainties
- Gradient and intercept
- Line of best fit
- Multiplication and division rule
- Percentage form
- Precision
Using Addition and subtraction rule 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.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge