Use Algebraic Terminology (Numerical Expression, Algebraic Expression)

(6) Expressions, equations, and relationships. The student applies mathematical process standards to use multiple representations to describe algebraic relationships.

(Y7) Introduce the concept of variables as a way of representing numbers using letters (ACMNA175)

6.EE.1 Write and evaluate numerical expressions involving whole-number exponents.

6.EE.2 Write, read, and evaluate expressions in which letters stand for numbers.