Topic 2 · Number & Algebra
Expressions & Formulae
Simplifying, algebraic fractions, expanding brackets, substitution and rearranging formulae.
By the end of this topic you can…
- Simplify expressions using the laws of indices
- Add, subtract, multiply and divide algebraic fractions
- Expand the product of two linear expressions
- Substitute into a formula and change its subject
Lessons
- Simplifying and the Laws of Indices Multiplying and dividing algebraic terms with the index laws, and collecting like terms.
- Algebraic Fractions Adding and subtracting fractions with letters in them, and simplifying by factorising and cancelling.
- The Product of Two Linear Expressions Expanding with an area model and the distributive law, including perfect squares and the difference of two squares.
- Substitution and Constructing Expressions Putting numbers — including negatives and decimals — into formulae, and building expressions for areas and number puzzles.
- Changing the Subject of a Formula Rearranging formulae with function machines and the balance method, including when the letter is negative or in a denominator.
Expressions and formulae quiz
Twelve questions drawn at random from a bank of sixteen, covering simplifying, algebraic fractions, expanding brackets, substitution and rearranging.
12 questions · pass mark 70%