Key learning points

1. Like terms and their coefficients can be identified.
2. Like terms can be represented using a bar model.
3. Like terms can be collected together, paying careful attention to coefficients.
4. Expressions are easier to use once you have collected all the like terms.

Common misconception

Keywords

• Like terms - Like terms are terms that have the same set of variables and corresponding exponents.

• Simplify - Simplifying is to write an expression in the most efficient and compact form without affecting the value of the original expression.