Expressions Intro

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

What does the letter 'c' represent in an expression?

Back

The letter 'c' is a variable that can stand for any number.

Front

Evaluate: c - d if c = 5 and d = 2.

Back

3

Front

Evaluate: 4 + c if c = 2.

Back

6

Front

What does the letter 'x' stand for in algebra?

Back

An unknown number.

Front

Simplify: x + 2x.

Back

3x.

Front

Back

4

Front

What is a variable?

Back

A symbol (like x or y) that represents an unknown value.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation does.

Front

What is the purpose of simplifying an expression?

Back

To make it easier to understand and solve.