Just Do It (mentally)

Math 367 – Math Teaching Methods

Day 1

Day 2

J.R.Olsen ~ W.I.U.

Day 3

Day 4

Day 5

Day 6

Day 7

Day 8

Day 9

Day 10

Day 11

Day 12

Day 13

Day 14

Day 15

Day 16

Day 17

Focusing on Fractions,

Decimals, and Percents

J.R.Olsen ~ W.I.U.

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Day 1 Questions

Record your answers to the following in the Mental Math Section of your notebook.

1. 10% of 650 is ___

2. 50% of 860 is ___

3. The regular price of a pair of jeans is $46. If they are on sale for 50% off, what is the sale price?

4.

5. If one third of the sixth grade class of 120 students exceeded state standards, how many sixth graders exceeded state standards?

6. Solve: 10x = 43

Bonus: 70% of 80 = ___J.R.Olsen ~ W.I.U.

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135

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Day 1 Answers

Check your answers.

1. 652. 4303. $234. 75. 40 sixth graders6. 4.3Bonus: 56

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Website of the Day: Make a Match

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Day 2 Questions

Record your answers to the following in the Mental Math Section of your notebook.

7. One-eighth of 320 is ___

8. 12.5% of 40 is ___

9.

10.

11. If 37.5% of the teachers union, which has 160 members, is against the proposal, how many are against the proposal?

12. What is the 10% tourism tax on a $65.00 ticket?

Bonus: 30% of 800 = ___J.R.Olsen ~ W.I.U.

340

5

380

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Day 2 Answers

Check your answers.

7. 408. 59. 2410. 3011.60 teachers12. tax is $6.50

Bonus: 240

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Web site of the Day: Meteor Multiplication

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Day 3 QuestionsRecord your answers in your notebook.

13.If you get 25% more free and normally there are 20 ounces, how many ounces do you get?

14. 820 .25

15. Change to a fraction: 60%

16.

17. If five-eighths of the cookie dough is used, how much is left?

18. If is the probability of winning, what is the probability of losing?

Bonus: 75% of 820 is ___J.R.Olsen ~ W.I.U.

31

5

11

17

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Day 3 Answers

Check your answers.

13.20 + 5 = 25 oz.14. 205

15.

16.

17. Three-eighths18. Six-seventeenths

Bonus: 615

J.R.Olsen ~ W.I.U.

6 3

10 5

2

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Web site of the Day: Fresh Baked Fractions

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Day 4 Questions

Record your answers in your notebook.

19.If 30% of the school walks to school, what fraction is this?

20.Find 12% of 600.

21.If 23% of the 2,000 students in the district qualify for free or reduced lunch, how many students qualify for free or reduced lunch?

22.

23. If 21/25 of the construction paper is used up, what fraction remains?

24. Find 12.5% of 56.

Bonus: .03 130 = ___ J.R.Olsen ~ W.I.U.

51

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Day 4 Answers

Check your answers.

19.

20.72

21. 460 students

22.

23.

24. 7

Bonus: 3.9

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3

10

9

144

25

Web site of the Day: Jigsaw Puzzle

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Day 5 Questions

Record your answers in your notebook.

25.

26.

27. What is the 5% tax on a $9 item?28. Find the 15% tip on a bill of $16.00.

29.

30. If 87.5% of the students are present and enrollment is 800, how many students are present?

Bonus: 110% of 800 is ___

J.R.Olsen ~ W.I.U.

145

5

445

5

572

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Day 5 Answers

Check your answers.

25. 926. 3627. $0.4528. $2.4029. 4530. 700 students presentBonus: 880.

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Web site of the Day: Find Grampy-Strict

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Day 6 Questions

Record your answers to the following in the Mental Math Section of your notebook.

31.10% of 5.63 = ___32. Find the 20% tip on a bill of $32.00.33. 25% of $40 = ___34. 125% of $40 = ___35. If the PTO is selling pizzas, which cost them

$6, and they want to make a 25% profit, how much should they charge for a pizza?

36. Change to a mixed number: 150%

Bonus: Change to a mixed number: 280%

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Day 6 Answers

Check your answers.

31. .56332. $6.4033. $1034. $5035. $6 + $1.50 = $7.5036.

Bonus:

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11

24

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Web site of the Day: Place Value Pirates

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Day 7 Questions

37.If you start with 5¾ cups of sugar and use 2½ cups, how many are left over?

38.If you start with 14.7 liters and pour out 3.3 liters, how much is left?

39.If you start with 200 kg and 15% is removed, how much is left?

40.If you need to register 240 students and ¼ have already be registered, how many still need to be registered?

41. 8,000,000 .125 42. 33⅓ % of 6,000 is ___

Bonus: 7/8 96 = 96 8 7 = 12 7 = 84

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Record your answers in your notebook.

Day 7 Answers

Check your answers.

37. 3¼

38. 11.4 liters

39. 170 kg

40. 180 students

41. 1,000,000

42. 2,000

Bonus: Find the tip on an $82 bill.

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Web site of the Day: Star Gazing

Day 8 Questions

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43.1% of 45.7 is ___

44. 0.01 5,000 = ___

45. 3% of 5,000 = ___

46. If 1% of the population of 3,000,000 got the H1N1 flu, how many got the flu?

47. 110% of 50 = ___

48. If the sales tax is 5% and the cost of the shirt is $30, how much do you have to pay?

Bonus: $8.20 + $4.10 = $12.30

Record your answers in your notebook.

Day 8 Answers

Check your answers.

43.4.57

44. 50

45. 150

46. 30,000

47. 5.5

48. $31.50

Bonus: Find the tip on an $82 bill.

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Web site of the Day: Crack the Code

Day 9 Questions

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49. If 20% of the students were below standards on the pretest, and there are 450 students, how many were below standards?

50. Find 8% of 7,000.

51. If the item costs the store $50 and there is a 40% markup, what will the retail price be?

52. $20.40 – $1.90 = ___ (Hint: use equal additions)

53.

54. If you start with 19.3 mL and use 5.8 mL, how much is left?

Bonus: Change to a percent:

Record your answers in your notebook.

2 45 1

5 5

13

20

Day 9 Answers

Check your answers.

49. 90 students

50. 560.

51. $70

52. $20.40 – $1.90 = 20.50 – 2.00 = $18.50

53.

54.19.3 – 5.8 = 19.5 – 6 = 13.5 mL

Bonus: 65%

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3 35 2 3

5 5

Web site of the Day: Fishy Fractions – Equivalent Fractions

Day 10 Questions

55. Change to a percent:

56. If three-twentieths of the school attended the game, what percent attended the game?

57. Change to a fraction: 85%

58. If 35% of the solution is acid, what fraction is acid?

59. Change to a fraction: 66⅔ %

60. 66⅔ % of 12 = ___

Bonus: 75% of 52 = ___

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Record your answers in your notebook.

1

20

Day 10 Answers

Check your answers.

55. 5%

56. 15%

57.

58.

59.

60. 8

Bonus: 39

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17

207

202

3

Web site of the Day: Fishy Fractions - Adding

Day 11 Questions

61.

62. If of the frogs have red spots and there are 420 frogs, how many have red spots?

63. Solve:

64. Solve:

65. Solve:

66. 27% of 200 kg = ___

Bonus: 137.5% of 800 is __

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Record your answers in your notebook.

3350

5

4

7

2120

3x

4440

5x

83,200

5x

Day 11 Answers

Check your answers.

61. 70 3 = 210

62. 60 4 = 240

63.

64.

65.

66. 54 kg

Bonus:

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3120 180

2x

5

440 110(5) 5504

53,200 400(5) 2,000

8

31 of 800 is 1,100

8Web site of the Day: Fishy Fractions - More

Day 12 Questions

Find the shooting percentage of each player

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Record your answers in your notebook.

Day 12 AnswersCheck your answers.

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Web site of the Day: Mission Magnetite

Day 13 Questions

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Record your answers in your notebook.

Estimate the shooting percentage of each player

Day 13 AnswersCheck your answers.

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Web site of the Day: Bucky's Blueprints

Day 14 Questions

79. 1 – .2780. If the poll shows 46% in favor, what percent

is against?81. If the probability of getting an ‘A’ is 29%,

what is the probability of not getting an ‘A’?82. If 25.5% are incorrect, what percent are

correct?83. If 19.4% of the customers used a coupon,

what percent did not use a coupon?84. If 37% of the shots were missed, what percent

of the shot scored?

Bonus: If 0.22% of the solution is a contaminant, what percent is pure? J.R.Olsen ~ W.I.U.

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Record your answers in your notebook.

Day 14 Answers

Check your answers.

79. .73

80. 54%

81. 71%

82. 74.5%

83. 80.6%

84. 63%

Bonus: 99.78% pure

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Web site of the Day: Sleuths on the Loose

Day 15 Questions

85.If the 24 oz. bottle of hand lotion is on special and you receive 33⅓% free, how many ounces should you receive?

86. The club has $670 to spend this year. They budget 10% for supplies. How much is budgeted for supplies?

87. Three-fifths of the delegates favored the motion. If there are 55 delegates, how many favored the motion?

88. If the length is 1.2 cm and width is 3 cm, what is the area?

89. 75% of 96 = ___

90. Change to a percent:

Bonus: If 25% have inadequate health care and there are 2.4 million people, how many have inadequate health care?

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Record your answers in your notebook.

3

5

Day 15 AnswersCheck your answers.

85. 24 + 8 = 32 oz.86. $6787. 33 delegates 88. 3.6 cm²89. 7290. 60%

91. Bonus: .6 million = 600,000 people

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Web site of the Day: Death to Decimals

Day 16 Questions

91. A piece of paper starts with a length of 11 inches. Five-eighths of an inch are cut off. What is the new length?

92. 12% of 9,000 € = ___

93. If the length and width are 20 feet and 2.4 feet, what is the area?

94. If the length and width are 20 feet and 2.4 feet, what is the perimeter?

95. What is the 15% service charge on a purchase of $42.00?

96. If there were 300 members last year and this year there is a 20% increase, how many members are there this year?

Bonus: If Julie is 52 for 80, what is the shooting percentage?

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Day 16 Answers

Check your answers.

91. 10 and three-eighths inch.

92. 1,080 €

93. 48 sq. ft.

94. 44.8 ft.

95. $6.30

96. 360 members

Bonus: 52/80 = 13/20 = 65%

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Web site of the Day: Fraction Pairs Game

Day 17 Questions

97. A piece of paper starts with a width of 8½ inches. One and seven-eighths of an inch are cut off. What is the new width?

98. Jordan start with $13.20. He pays $4.90 for lunch. How much does he have left?

99. If Geoff has 6 hits in 24 at-bats, what is his batting average (convert to a 3-place decimal)?

100. 120% of 70 = ___ 101. 0.1% of 80 = ___102. 37.5% of 4,000 € = ___ Bonus: If 1 in 7 residents receive a property tax

bill and there are 109,200 residents, how many tax bills are there?

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Day 17 Answers

Check your answers.

97.

98. $8.30

99. .250

100. 84

101. 0.8

102. (3/8)4000 = 3500 = 1,500 €

Bonus: 15,600 tax bills

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Web site of the Day:Fraction (and percent) Four

Web site of the Day:Balloon Invaders II

56 inches

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