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 c² - 11 if c = 8.

Back

53

Front

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

Back

18

Front

Evaluate 4w - 3y if w = 7 and y = 6.

Back

10

Front

Evaluate 2a + 4b if a = 10 and b = 6.

Back

44

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.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change.

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).