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6 week DCA Test Review 1. Simplify: 2. (3(9 4) 6 11 + (-7) 7. -2 + n = -19 8. n = - 18 3 9. 3x + 4 = -32 10. Write a fraction multiplication expression to represent the model: for c = -3 a. -9 b. -5 3. a. 22 for a = –1 and b = –3 b. –22 c. 8 d. –8 4. a. 6 Solve showing all steps: c. 5 d. 9 for x = –8 and y = –6 b. 1 c. 9 d. 4 5. You have $20 to spend. You buy socks that cost $3 per pair. a. Write an expression for the amount of money you have left after buying s pairs of socks. 11. Illustrate the following multiplication problems using the arrays provided: a. 1 2 x 2 3 b. 1 3 x 3 5 _______________________________ b. How many pairs of socks did you buy if you have $8 left? _______________________________ 6. Simplify: a. 71 b. –19 c. –41 d. 49 12. Match each point with one of the following rational numbers: –0. , , A , 0.925. B C 16. Explain how you could predict the sign of the product of –8, 9, 7, and – 4 without actually multiplying. D –1 __________________________________________ 0 A____ B____ C____ D____ 17. Why is the absolute value of a number always positive?__________ 1 4 13. Paul needs 2 yd of fabric to make a tablecloth. How many tablecloths can he 1 4 make from 20 yd of fabric? a. 9 tablecloths c. 8 tablecloths b. 10 tablecloths d. 11 tablecloths 18. If the model below represents the equation x + 3 = 5, what is the value of x?______ 1 2 14. Sue needs 1 cups of flour for a batch of cookies. How many complete batches can she make with 20 cups of flour? a. 12 batches b. 11 batches c. 14 batches d. 13 batches 15. The table below shows the scores for two teams playing a series of four card games. Team 1 Team 2 Game 1 Game 2 Game 3 Game 4 13 –15 8 –9 –12 13 12 –13 a.Find the totals for each team after two games. b.If the winner is the team with the greater score, which team is winning after two games? c.Would the results be any different after all four games? Why or why not? 19. If the model below represents the equation 3n = 9, what is the value of n?______ 20. Use the number line to draw a model of the expression 4 – 7. –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 21. Use the number line to draw a model of the expression -3 + 5 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8