Substitution (Edexcel GCSE Maths): Flashcards
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Practise the cards
11 cards from this deck
Definition of substitution
Definition of substitution
Replacing letters with given numerical values
Basic substitution process
Basic substitution process
Replace each letter with its number, then calculate
BIDMAS acronym
BIDMAS acronym
Brackets, Indices, Division, Multiplication, Addition, Subtraction
First step in BIDMAS
First step in BIDMAS
Brackets - work out anything in brackets first
Second step in BIDMAS
Second step in BIDMAS
Indices - calculate powers and roots
Third and fourth steps in BIDMAS
Third and fourth steps in BIDMAS
Division, then Multiplication
Fifth and sixth steps in BIDMAS
Fifth and sixth steps in BIDMAS
Addition, then Subtraction
When to substitute values in expressions
When to substitute values in expressions
Before starting any calculations
How to write negative numbers when substituting
How to write negative numbers when substituting
Put them in brackets
Why use brackets for negative numbers
Why use brackets for negative numbers
To avoid mistakes and confusion
Why show working in exam questions
Why show working in exam questions
To get method marks even if final answer is wrong