Expressions Vocabulary

Front

What is an expression in mathematics?

Back

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

Front

How many terms are in the expression 3x + 5y - 17 - 2y + x?

Back

5

Front

What is a coefficient in an expression?

Back

A coefficient is the number that comes before the variable.

Front

Define a variable in the context of an expression or equation.

Back

A variable is a letter used to represent a number value.

Front

How many terms are in the expression -18y + 7yz - 4z?

Back

3

Front

What is a term in a mathematical expression?

Back

A term is a part of a mathematical expression separated by addition or subtraction symbols.

Front

What is the difference between a term and a coefficient?

Back

A term is a complete part of an expression, while a coefficient is the numerical factor of a term.

Front

Can an expression have no variables? Give an example.

Back

Yes, an expression can have no variables. For example, 5 is an expression with no variables.

Front

What is the role of operators in an expression?

Back

Operators (such as +, -, *, /) indicate the mathematical operations to be performed on the terms.

Front

How do you simplify the expression 3x + 5y - 2y + x?

Back

Combine like terms to get 4x + 3y.