Expressions, equations, and inequalities

Front

What is an expression?

Back

A math sentence involving variables, numbers, and operations.

Front

What is a variable?

Back

A letter or symbol that replaces an unknown amount that can vary, or change.

Front

Evaluate: Twice the number of people

Back

Front

Bob had X pieces of chicken while his wife had 4 less. Which expression could represent the statement?

Back

Front

Evaluate: 8 more gumballs than Javier has

Back

Front

What is an equation?

Back

A mathematical statement that asserts the equality of two expressions.

Front

What is an inequality?

Back

A mathematical statement that compares two expressions and shows that one is greater than, less than, or not equal to the other.

Front

Evaluate: 5 less than a number x

Back

Front

What does it mean to evaluate an expression?

Back

To calculate the value of the expression by substituting numbers for the variables.

Front

What is the difference between an expression and an equation?

Back

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