Multiply and Divide Signed Numbers: Play Answer Sheet

Transcription

1 Name Date Multiply and Divide Signed Numbers: Play Answer Sheet Selected-Response Items Indicate the letter(s) only Fill-in-the-Blank Items 6. (a) 7. (a) 8. (a) (a) 14. (a) 15. Discovery Education Techbook Discovery Communications, LLC

2 Multiply and Divide Signed Numbers: Play Number of Questions: 15 Questions 1 5 are selected-response questions. Write the letters of the correct answers on the answer sheet. 1. Select the multiplication and division problems that have the same answer. 28 A., ( 4) (1) 7 B. 68, ( 6) ( 3) 4 C. 100, (10) ( 2) 5 36 D., ( 3) (2) 6 2. Which number line demonstrates the correct product of 6 ( 3)? A. B. C. D. Discovery Education Techbook Discovery Communications, LLC 1

3 3. Jacob noticed an interesting relationship in the temperature on Saturday and Sunday. If you multiply Saturday s temperature by 3 and then add it to Saturday s temperature, you get the temperature on Sunday, he said. Which set of thermometers accurately depicts the relationship that Jacob described? A. Saturday Sunday B. Saturday Sunday C. Saturday Sunday D. Saturday Sunday Discovery Education Techbook Discovery Communications, LLC 2

4 4. Mr. Smith will take his class see a dinosaur exhibit at a museum. The tickets usually cost $12 each. Because Mr. Smith will be purchasing 30 tickets, the museum will reduce the cost of each ticket by $3. Mr. Smith can calculate the total ticket cost using the expression: 30 (12 3) Which of the following expressions can also be used to calculate the total ticket cost? A. 12 (30 3) B. (12 30) (12 3) C. (30 12) (30 3) D. (30 12) (30 3) 5. Sylvia sets up an automatic payment process to pay for her new bicycle. She has $50 deducted from her account every month. Sylvia forgets and allows the payments to continue for 15 months. If the cost of the bicycle is $480, what does $270 represent? A. the amount that Sylvia still owes the store B. the amount that the store owes Sylvia in return C. the amount that Sylvia has paid toward the price of the bicycle D. the amount that Sylvia has left in her bank account Questions 6 15 are fill-in-the-blank questions. Write the correct answers in the spaces provided on the answer sheet. 6. Find the value that makes each numerical statement true: 39 3? (a) 64? 8 7. In his first football game, Joe struggled. He carried the ball 6 times and was tackled behind the line of scrimmage each time. In total, he gained 24 yards. What was Joe s average yards gained per carry? (a) yd Suppose that Joe continues to average the same number of yards gained per carry for his next 15 carries. What is the total number of yards he will gain, including his total from the first game? yd 8. For each expression below, fill in the blank with a number that makes the total value of the expression less than 0: (a) (5)( )( 3)( 1) (b) (5 )( 3)( 1) Discovery Education Techbook Discovery Communications, LLC 3

5 9. At the Pleasant Valley Golf Course, the average player finishes 18 holes in 85 shots. Landon can complete the course in 77 shots. How many complete rounds does Landon need to play to have taken at least 100 fewer shots than the average player would? Number of completed rounds = 10. Simplify the expression. 3(24 + 7) = 11. A submarine can descend at a rate of 2.5 meters per second. Suppose that the submarine begins at a depth of 25 meters. How long would it take the submarine to reach its maximum depth of 200 meters? sec 12. Two integers have a product of 24 and a sum of 10. What are the values of the two integers? Write both integers on the answer sheet. and 13. A piece of driftwood floats on the surface of the ocean. Due to the wave motion, its height rises and falls relative to the height of the water with no waves. The maximum height of the driftwood is 2 feet, relative to the surface, and its minimum height is 1.5 feet. A storm surge causes the height of the waves to be multiplied by 4. What is the minimum height of the driftwood in the storm? (a) ft What is the distance between the maximum and minimum heights of the driftwood during the storm? ft 14. It takes 40 units of maple sap to produce one unit of maple syrup. Jane and her family are bottling maple syrup in 20-ounce bottles. She notices that they add about 2 ounces of air every time they fill a bottle, to avoid overfill. How much maple sap did they need to collect to fill 15 bottles? (a) oz How much less maple sap did they need than if they would have filled each bottle to the top? Express your answer as a negative number. oz 15. Gretchen and Mika are involved in a relay race. Both runners are at the same point on the course when Gretchen realizes that she dropped her baton and has to turn around to retrieve it. Gretchen runs backward at a speed of 4 meters per second, relative to the direction of the race. Mika continues running at a speed of 3 meters per second. If Gretchen dropped her baton 48 meters from her current location, relative to the direction of the race, how far ahead will Mika be when Gretchen picks her baton up? m Discovery Education Techbook Discovery Communications, LLC 4