Evaluating Expressions

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 3d if d = 5

Back

15

Front

Evaluate x ÷ 4 if x = 80

Back

20

Front

Evaluate the expression when x = 3: 2x² - 5

Back

13

Front

Evaluate when x = 8: 2x + x - 10

Back

14

Front

Evaluate 3x + 8 if x = 2

Back

14

Front

What is a variable in mathematics?

Back

A variable is a symbol used to represent an unknown value, often denoted by letters such as x, y, or z.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, and division) that represents a value.

Front

What is the order of operations?

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). Often abbreviated as PEMDAS.

Front

Evaluate 4 + 2 × 3

Back

10