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 variables with numbers and performing the operations.

Front

If p = -6, what does p + 4 equal?

Back

-2

Front

Evaluate the expression when x = 5 and z = 4: z² - 2x.

Back

6

Front

Let g = 3 and h = 9. Evaluate: 4h + 2g + 4.

Back

46

Front

Simplify the following: -8 + (15 - 3) ÷ 4.

Back

-5

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

Solve: 2⁴ - 24 ÷ 3 + 1.

Back

9

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.

Front

What is the difference between an expression and an equation?

Back

An expression is a mathematical phrase without an equality sign, while an equation states that two expressions are equal.