Which expression represents the
number of stamps Sarah has left?
• Sarah collects stamps and keeps
them in envelopes. She had 9
envelopes with a certain number
of stamps, s, in each envelope.
She sells 3 of the envelopes.
• A. 9s - 3
• B. (9 + 3) s
• C. 9s - 3s
• D. 9s - s - 3
Answer:
• C. 9s - 3s
What is the area of the wall
that Keesha will paint?
• 2. Keesha will paint one rectangular
wall of her bedroom. The wall
measures 10 feet by 8 feet.
A= lxw
• A. 18 square feet
• B. 64 square feet
• C. 80 square feet
• D. 100 square feet
Answer:
• C.
80 square feet
What number should
replace n?
If 47 - n = 29, what number
should replace n to make the
sentence true?
•
A. 12
•
B. 18
•
C. 21
•
D. 22
Answer:
• B. 18
Write an expression for the
number of hummingbirds
Lewis saw on Saturday.
• On Friday, Lewis saw a certain
number of hummingbirds, h. On
Saturday, he saw 3 more than
twice the number of
hummingbirds he saw on Friday.
Write your answer.
Answer:
• 3 + 2h
Explain the difference
between an expression
and an equation?
• Answer:
• Equation has an equal sign.