9.6 Evaluate Expressions

When a symbol, such 🟩 or a letter is used to stand for an unknown, it is called a ________________.

• variable

• expression

When you find the value of an expression by replacing the variable with a number, you _________ the expression.

• evaluate

• equal

Tomas has $10. Ally has 🟩 more than Tomas. If 🟩 = $5, how much money does Ally have?

$_______

There are 5 swing sets at a playground. Each swing set has 🟩 swings. If 🟩 = 3, what is the total number of swings?

________ swings

Jimena put 5 pencils and 🟪 pens in a pencil box for each of her 2 friends. If 🟪 = 3, how many pencils and pens did Jimena put in pencil boxes?

_______ pencils and pens

Evaluate each expression if a = 2 and b = 5.

3 + a

Evaluate each expression if a = 2 and b = 5.

11 - b

Evaluate each expression if a = 2 and b = 5.

b x 4

Evaluate each expression if a = 2 and b = 5.

12 ÷ a + 4

Evaluate each expression if z = 7 and y = 20.

( 8 x z ) - y