Evaluating Expressions and Simplifying

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

What is the value of 3x + 4 when x = -2?

Back

-2

Front

What is the value of m² if m = 7?

Back

49

Front

What is the value of x ÷ 4 if x = 80?

Back

20

Front

What is the value of 3x - 7 if x = 12?

Back

29

Front

What is the value of 5m + 7 if m = 5?

Back

32

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

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 the difference between an expression and an equation?

Back

An expression is a mathematical phrase that represents a value, while an equation states that two expressions are equal.