3. $100 Algebraic Expressions Circumference Area of a Circle Pan-Balance Problems Miscellaneous $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 Review Jeopardy

4. Which of the following is an algebraic expression? 9 + 6 n + 2 = 8 5 + n

5. Chloe collected 10 more cans than Tammy. Write an algebraic expression for the number of cans Tammy collected. C - 10

6. Becky is 15 pounds less than Greg. Write an algebraic expression for how much Greg weighs. B + 15

7. Jamie has half as many cookies as her sister Meg. Write an algebraic expression that shows how many cookies Jamie has. ½ x M M ÷ 2 m/2

8. 8h Steve earns $8 an hour. Write an algebraic expression that shows how much money he makes in h hours.

9. What is the formula for finding the circumference of a circle? C = π x d or C = 2 x r x π

10. What is circumference? Circumference is the distance around a circle (a circle’s perimeter).

11. What is the circumference of a circle that has a diameter of 5 ft.? Round to the nearest hundredth. 15.70 ft.

12. What is the circumference of a circle that has a radius of 4 in.? Round to the nearest hundredth. 25.12 in.

13. What is the circumference of a circle that has a radius of 12 cm.? Round to the nearest hundredth. 75.36 cm.

14. What is the formula for finding the area of a circle? A = π x r²

15. What is the area of a circle that has a radius of 15cm.? Round to the nearest hundredth. 706.50 cm²

16. What is the area of a circle that has a radius of 8in.? Round to the nearest hundredth. 200.96 in²

17. What is the area of a circle that has a diameter of 10 in.? Round to the nearest hundredth. 78.50 in²

18. What is the area of a circle that has an radius of 7 cm? Round to the nearest hundredth. 153.86 cm²

19. One cube weighs as much as how many marbles? 11 marbles

20. One cube weighs as much as how many oranges? 3.5 oranges

21. One block weighs as much as how many marbles? 3 marbles

22. One block weighs as much as how many marbles? 2 marbles

23. Using the two pan-balances, solve the problems below. 1 coin = 2 clips 1 block = 4 clips

24. The wheels on Will’s bicycle have a diameter of 25 inches. About how far will he travel if the wheels go around exactly once? 78.50 inches 50% 5%

25. What is the difference between an algebraic expression and an algebraic equation? Both contain variables, but the algebraic equation contains an equals sign. 5%

26. Complete the “in” and “out” table. Left column: 5 Right column: 28, 56, 84, 154

27. For the following situation, would you need to find the circumference, perimeter, or area? Jana needs to decide how much fence to buy to surround her rectangular garden. perimeter

28. Matt wrote an equation but covered one number. What is the covered number? 10 + 7 =  ? + 13 4

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