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 does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their given values.

Front

If a=3 and b=4, what is the value of 7a + 8b x 2?

Back

85

Front

How do you perform operations in an expression?

Back

Follow the order of operations: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is the order of operations?

Back

The order of operations is PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction.

Front

Evaluate the expression 9y ÷ (2x + 1) for x=7 and y=15.

Back

9

Front

What is the value of y² + 4 x 6 when y=15?

Back

249

Front

If a=3, what is the value of 36 ÷ 6a?

Back

18

Front

What is a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value.

Front

What is a coefficient in an expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression.