Using algebra (Edexcel GCSE Maths): Flashcards
📚Flashcards
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Practise the cards
12 cards from this deck
What variables represent in word problems
What variables represent in word problems
Unknown values/quantities
1st step: setting up equations from word problems
1st step: setting up equations from word problems
Choose a letter (variable) for an unknown quantity
2nd step: setting up equations from word problems
2nd step: setting up equations from word problems
Write expressions for other unknowns using your letter
3rd step: setting up equations from word problems
3rd step: setting up equations from word problems
Set up equation using the total/relationship given
What substitution means in algebra
What substitution means in algebra
Replacing variables with actual numbers
What a counter-example is
What a counter-example is
A value that makes the statement incorrect
Counter-examples needed to prove a statement false
Counter-examples needed to prove a statement false
Only one
Rectangle perimeter formula (algebraic)
Rectangle perimeter formula (algebraic)
Why check solutions in algebra problems
Why check solutions in algebra problems
Catch errors and ensure solution makes sense
How to check algebra solutions
How to check algebra solutions
Substitute answers back into original problem
What to verify when checking solutions
What to verify when checking solutions
Conditions satisfied, arithmetic correct, question answered
Why define variables clearly in geometry problems
Why define variables clearly in geometry problems
Prevents confusion with multiple unknown measurements