2. Algebra Gr. 6 #1

3. 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

4. Answer: C. 9s - 3s

5. 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 = l x w A. 18 square feet B. 64 square feet C. 80 square feet D. 100 square feet

6. Answer: C. 80 square feet

7. 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

8. Answer: B. 18

9. 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.

10. Answer: 3 + 2h

11. Explain the difference between an expression and an equation? Answer: Equation has an equal sign.