Evaluating Expressions

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

Evaluate 3x + 4 when x = -2.

Back

-2

Front

Evaluate m - n if m = 29 and n = 11.

Back

18

Front

What is the result of dividing 12 by 4?

Back

3

Front

Evaluate 5m + 9n if m = -7 and n = 4.

Back

1

Front

Evaluate n^3 if n = 4.

Back

64

Front

What is the value of x in the expression 2x + 3 = 11?

Back

4

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is a variable in an expression?

Back

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