Variables and algebraic expressions

What you need to learn in this topic

1. Use letters to represent quantities with unknown values. Hence, state whether the value of the variable varies or fixed, with justification.
2. Derive algebraic expressions based on arithmetic expressions that represent a situation.
3. Determine the values of algebraic expressions given the values of variables and make connection with appropriate situations.
4. Identify the terms in an algebraic expression. Hence, state the possible coefficients for the algebraic terms.
5. Identify like and unlike terms.
6. Add and subtract two or more algebraic expressions.