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

Evaluate the expression 30 + r² for r = 3.

Back

39

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.

Front

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

Back

18

Front

What is the result of dividing a number by zero?

Back

Undefined

Front

Evaluate the expression 3x + 8 if x = 2.

Back

14

Front

What does the term 'variable' mean in mathematics?

Back

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

Front

What is the value of p × p × p when p = 2?

Back

8

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

Evaluate the expression 5 + 2 × 3.

Back

11