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 their given values and performing the operations.

Front

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

Back

40

Front

Evaluate x ÷ 4 if x = 80.

Back

20

Front

Evaluate c² - 11 if c = 8.

Back

53

Front

Evaluate y + 17 if y = 11.

Back

28

Front

Evaluate m² if m = 7.

Back

49

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 mathematics?

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 equation and an expression?

Back

An equation is a mathematical statement that asserts the equality of two expressions, while an expression does not include an equality sign.