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 2y when y = 8.

Back

16

Front

Evaluate n³ when n = 4.

Back

64

Front

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

Back

44

Front

Evaluate 4y when y = 3.

Back

12

Front

What is the value of x if x = 5 in the expression 3x + 2?

Back

17

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

If the length is 5 and the width is 3, what is the area of the rectangle?

Back

15