The coefficient 1 is invisible: 1 × x = x
Write 3x not x3, write 5ab not ab5
Write 3x not 3 × x, write 2ab not 2 × a × b
x × x = x², not xx. Also: x × x × x = x³
Write x/2 or ½x instead of x ÷ 2
Write 3ab not 3ba, write xyz not zyx
This deep dive covers Notation Rules (Must Know!) within Algebraic Notation for GCSE Mathematics. Revise Algebraic Notation in Algebra for GCSE Mathematics with 13 exam-style questions and 4 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 3 of 7 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Algebraic Notation
In the expression 7x, what is the coefficient?
Explain the difference between an equation and an identity. Give one example of each.