2.1 Use of symbols

understand that symbols may be used to represent numbers in equations or variables in expressions and formulae

Understand that algebraic expressions follow the generalised rules of arithmetic.

use index notation for positive and negative integer powers, including zero

use index laws in simple cases: xᵐ × xⁿ = xᵐ⁺ⁿ, xᵐ ÷ xⁿ = xᵐ⁻ⁿ and (xᵐ)ⁿ = xᵐⁿ

use index notation involving fractional, negative and zero powers