2. Jeopardy Multiplying Fractions Dividing Fractions Multiplying Decimals Dividing Decimals Misconceptions & Error Patterns Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

3. $100 Question from H1 What is one fourth of one half?

4. $100 Answer from H1 One eighth

5. $200 Question from H1 A recipe needs one fourth of a tablespoon of salt. How much salt does 8 recipes need?

6. $200 Answer from H1 2 tablespoons

7. $300 Question from H1 Peter’s truck gets him 10 2/3 miles Per gallon. Suppose Peter’s tank is Empty and he puts 5 ½ gallons in it, How far can Peter go with the truck?

8. $300 Answer from H1 58 2/3 miles

9. $400 Question from H1 Band practice lasted 1 1/4 hours. Two thirds of the time was spent marching. How much time was spent marching?

10. $400 Answer from H1 5/6 of an hour

11. $500 Question from H1 When the notary public asked Elizabeth her age, Elizabeth answered, "I am twice as old as my sister Amy. Amy is one-sixth as old as my father. My father is ninety years old." How old is Elizabeth?

12. $500 Answer from H1 30 years old

13. $100 Question from H2 7/19 ÷ 3/10

14. $100 Answer from H2 1 13/57

15. $200 Question from H2 Each camper's water bottle holds 3/10 of a gallon of water. There are 2 7/10 gallons of water in the cabin's water tank. How many water bottles can be filled with the water in the tank?

16. $200 Answer from H2 9 water bottles

17. $300 Question from H2 Renee wants to buy 7 1/4 cups of almonds. There are 3 5/8 cups of almonds in each package. How many packages of almonds should Renee buy?

18. $300 Answer from H2 2 packages

19. $400 Question from H2 Your Text Here

20. $400 Answer from H2 Your Text Here

21. $500 Question from H2 Kaitlyn found a recipe for a Mothering Cake in an old book at the library. In England during the 1600s, servants often made a Mothering Cake when they were allowed to visit their mothers on Mothering Sunday. The recipe for one small cake calls for one and one-fourth cups of sugar. Kaitlyn would like to make three cakes for Mother's Day. How many cups of sugar will she need to make all of the cakes?

22. $500 Answer from H2 3 ¾ cups

23. $100 Question from H3 3.5 x 7.4

24. $100 Answer from H3 25.9

25. $200 Question from H3 Eric's cow is very fragile, but she still gives about 15.6 gallons of milk a day. How many gallons does she give in one hundred seven days?

26. $200 Answer from H3 1669.2 gallons

27. $300 Question from H3 It was my fault that we arrived at the musical later than we had expected. I had to stop to get gas. I put eight gallons of gas in my car. Each gallon cost me $1.79. How much did I spend on gas?

28. $300 Answer from H3 $14.32

29. $400 Question from H3 Kyle sold popcorn boxes to raise money for the class trip. He wanted to transform himself into the top salesman in his class. He sold six boxes at $3.16 per box, nine boxes at $3.66 per box, and twelve boxes at $6.50 per box. What was his sales total?

30. $400 Answer from H3 $129.90

31. $500 Question from H3 Clarita's sister works in an American company in Amarillo, Texas. She works forty-one hours every week and is paid $11.22 per hour. She sends half of her weekly salary to Clarita to take care of their mother. How much money does Clarita's sister send home each week?

32. $500 Answer from H3 $230.01

33. $100 Question from H4 Tony has 5.8 kg of coffee. He will put them in 8 bags. How much will be in each bag?

34. $100 Answer from H4 Tony will put 0.725 kg of coffee in each bag.

35. $200 Question from H4 Gerry makes $7.58 an hour. He grossed $306.99 last week. How many hours did he work?

36. $200 Answer from H4 $40.50

37. $300 Question from H4 The beach is beginning to erode near the lighthouse. The lighthouse is only seventy-one feet from the water now. If the beach erodes at the rate of 2.6 feet per year, how many years will it be, rounded to the nearest year, before the water reaches the lighthouse?

38. $300 Answer from H4 27 years

39. $400 Question from H4 My bottle of medicine contains 21.5 ounces. I take 1.75 ounces each dose. How many doses are in the bottle?

40. $400 Answer from H4 About 13 12 will be accepted

41. $500 Question from H4 Your The winning Football team received $958,394.31. This money was split among 29 players and the coach. The players got 1 share each and and the coach got 0.875 shares, how much would one share be worth?

42. $500 Answer from H4 $32,080.14 Hint: Divide the total amount by 29.875 shares.

43. $100 Question from H5 2/3 x 3= 6/9 What error pattern is this student Using?

44. $100 Answer from H5 “They have multiplied the numerator and denominator by the same number,” Ashlock, (2010).

45. $200 Question from H5 6/10 ÷ 2/4 = 3/2 What error pattern does this show?

46. $200 Answer from H5 “The student divides across the top and then across the bottom. They are not concerned with remainders,” Ashlock, (2010).

47. $300 Question from H5 6.7 X 3 2.01 What error pattern is shown here?

48. $300 Answer from H5 “The student places the decimal point by counting over from the left instead of from the right in the product”, Ashlock, (2010).

49. $400 Question from H5 3.91 6|23.5 18 55 54 1 What error pattern is shown here?

50. $400 Answer from H5 “This student write the remainder as an Extension of the quotient,” Ashlock, (2010).

51. $500 Question from H5 What is the most popular misconception among students when dividing and multiplying fractions and decimals?

52. $500 Answer from H5 All multiplication problems make bigger products and all division problems make smaller quotients.

53. Final Jeopardy How could you model multiplication of fractions using a number line?

54. Final Jeopardy Answer

55. Resources Ashlock, B. A. (2010). Error patterns in computation: Using error patterns to help each student learn. Boston: Pearson.