Algebraic Expressions

What is a variable?

• a term that includes a variable

• a letter that stands for an unknown number

• a term that is a known number without variables

What does the letter x stand for?

• a letter

• an unknown number

Which operation is represented by 2x?

• addition

• subtraction

• multiplication

• division

What do you call the result of multiplication?

• sum

• difference

• product

• quotient

What is the coefficient in the expression 10-4x?

Write an expression to represent "the sum of 3 and the quotient of a number divided by 6."

Evaluate: 10 - (3h + 2) for h = 3

Mathematical Equivalence

ON

Emily bought a child admission ticket and 6 carousel ride tickets. She used a coupon for a $5 discount. Which expression shows Emily’s total cost?

• $12 + (6 x $2)

• $12 + ($6 + $2) - $5

• $12 + (6 x $2) - $5

• $12 + (6 x $2) + $5

Match the following:

• Difference

• Subtraction

• Quotient

• Multiplication

• Sum

• Division

• Product

• Addition