Rearranging formulae (Edexcel GCSE Maths): Flashcards
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Practise the cards
12 cards from this deck
Subject of a formula definition
Subject of a formula definition
Letter alone on one side of equals sign
Subject in
Subject in
Characteristics of the subject
Characteristics of the subject
Alone, no coefficients or other terms
Step 1: Finding missing value (not subject)
Step 1: Finding missing value (not subject)
Substitute known values
Step 2: Finding missing value
Step 2: Finding missing value
Solve the equation algebraically
Principle for changing subject
Principle for changing subject
Do same operation to both sides
Reason to balance both sides
Reason to balance both sides
Keeps formula correct
Rearranging: positive term technique
Rearranging: positive term technique
Subtract other terms first
Rearranging: fraction technique
Rearranging: fraction technique
Multiply to eliminate denominators
Rearranging: subject in brackets
Rearranging: subject in brackets
Expand first if necessary
as subject of
as subject of
Checking rearranged formula
Checking rearranged formula
Substitute back into original