Math Quiz

Critique Reasoning Lisa used a number line to model -2(3). Does her number line make sense? Explain why or why not.

Represent Real-World Problems Mike got on an elevator and went down 3 floors. He meant to go to a lower level, so he stayed on the elevator and went down 3 more floors. How many floors did Mike go down altogether? Solve. Show your work.

When Brooke buys lunch at the cafeteria, money is withdrawn from a lunch account. The table shows amounts withdrawn in one week. By how much did the amount in Brooke's lunch account change by the end of that week? Week 1 Monday Tuesday Wednesday Thursday Friday Lunch Account Lunch Cost Balance $28 Pizza $4 Fish Tacos $4 Spaghetti $4 Sandwich $4 Chicken $4

Adam is scuba diving. He descends 5 feet below sea level. He descends the same distance 4 more times. What is Adam's final elevation?

The price of jeans was reduced $6 per week for 7 weeks. By how much did the price of the jeans change over the 7 weeks?

Casey uses some of his savings on batting practice. The cost of renting a batting cage for 1 hour is $6. He rents a cage for 9 hours in each of two months. What is the change in Casey's savings after two months?

Volunteers at Sam's school use some of the student council's savings for a special project. They buy 7 backpacks for $8 each and fill each backpack with paper and pens that cost $5. By how much did the student council's savings change because of this project?

Communicate Mathematical Ideas Describe a real-world situation that can be represented by the product 8(-20). Then find the product and explain what the product means in terms of the real-world situation.

What If? The rules for multiplying two integers can be extended to a product of 3 or more integers. Find the following products by using the Associative Property to multiply 2 numbers at a time. a. 3(3)(-3) b. 3(-3)(-3) c. -3(-3)(-3) d. 3(3)(3)(-3) e. 3(3)(-3)(-3).

Make a Conjecture Based on your results, complete the following statements: 3(-3)(-3)(–3) When a product of integers has an odd number of negative factors, then the sign of the product is When a product of integers has an even number of negative factors, then the sign of the product is