Expression Vocabulary

Front

What is an expression in mathematics?

Back

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

Front

What is a coefficient?

Back

A coefficient is a numerical factor in a term of an expression. For example, in 5x, 5 is the coefficient.

Front

What is a constant in mathematics?

Back

A constant is a value that does not change. For example, in the expression 3x + 4, the number 4 is a constant.

Front

How do you simplify the expression 2(c - 8)?

Back

You distribute the 2 to get 2c - 16.

Front

What is a variable?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Front

How many terms are in the expression 5h + 3?

Back

There are 2 terms in the expression: 5h and 3.

Front

What is the result of simplifying 5(a + 6)?

Back

The result is 5a + 30.

Front

What is a term in an expression?

Back

A term is a single mathematical expression that can be a number, a variable, or a combination of both, separated by + or - signs.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.

Front

What is the difference between an expression and an equation?

Back

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