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 given numbers.

Front

Evaluate b² + 4 when b = 3.

Back

13

Front

Evaluate 5m + 7 if m = 5.

Back

32

Front

Evaluate n³ if n = 4.

Back

64

Front

Evaluate 4x - 2 when x = 6.

Back

22

Front

Evaluate 6y - 13 if y = 4.

Back

11

Front

What is the value of a variable?

Back

The value of a variable is the number that it represents when substituted in an expression.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is a variable in an expression?

Back

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