Tutorial
GCSE Maths: Substitution into Formulae
Learn how to substitute numerical values into algebraic expressions and formulae to find their value.
Tutorial
GCSE Maths: Substitution into Formulae
Learn how to substitute numerical values into algebraic expressions and formulae to find their value.
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Deck Contents
23 CardsLesson#1
Welcome to this deck on substitution. Substitution in algebra is like having a substitute teacher. The usual teacher, represented by a letter, is away, and a number comes in to take their place. We're going to learn how to replace these letters with numbers to find the value of expressions and formulae.
Quiz#2
In algebra, what does it mean to substitute a value into an expression?
replace the letter with the number
Lesson#3
Let's start with a simple example. Imagine you have the expression 'a plus 5'. If we are told that 'a' has a value of 3, we just replace the letter 'a' with the number 3. The expression becomes 3 plus 5, which equals 8.
Quiz#4
If 'a' is 10, what is the value of the expression 'a' plus 5?
15
Lesson#5
Remember that in algebra, when a number is right next to a letter, it means you multiply them. For example, the term '4p' means 4 times p. So if p was 2, 4p would be 4 times 2, which is 8.
Quiz#6
In algebra, what operation is indicated when a number is written directly next to a letter, as in the term '4p'?
multiplication
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