G6 Evaluating Mathematical Expressions

What does it mean to evaluate an expression?

• To simplify the expression by combining like terms

• To find the value of the expression

• To solve for the variable in the expression

• To graph the expression on a coordinate plane

What is the first step when evaluating an expression with given variable values?

• Perform all additions and subtractions

• Replace the variables with their given values

• Perform all multiplications and divisions

• Simplify any exponents

Evaluate the expression x + 22 when x = 5.

• 25

• 27

• 30

• 17

Evaluate the expression y - 10 when y = 15.

• 5

• 25

• 10

• 15

Evaluate the expression 6 + z when z = 7.

• 1

• 67

• 13

• 42

Evaluate the expression 8x when x = 5.

• 13

• 40

• 85

• 32

Evaluate the expression 7b - a when a = 10 and b = 9.

• 53

• 63

• 70

• 43

Evaluate the expression c * d + 5 when c = 3 and d = 4.

• 12

• 17

• 20

• 34

Evaluate the expression a + 18 ÷ b when a = 10 and b = 9.

• 12

• 28

• 10

• 19

Evaluate the expression 20 ÷ y - x when x = 2 and y = 5.

• 2

• 18

• 4

• 10