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TRANSCRIPT
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ExamName___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem.
1)
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There are 665 jelly beans in a jar. If 44 people take 15 jelly beans each from the jar, then how many are left?
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1)
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B 5A)
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10
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B)
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5
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C)
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4
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D)
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8
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response.
2)
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Is it reasonable to say that the answer for 63 ∙ 11 lies between 60 ∙ 10 and 65 ∙ 15. To which number do you think the answer is closer?
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2)
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It’s closer to the 60*10, because 11 is much closer to 10 than 15. 3)
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You have two numbers made up of the digits 9, 8, 7, 5, 3, where each digit is used only once. One of the numbers has 3 digits and the other has 2 digits. What is the greatest product you can get and what are the corresponding numbers?
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3)
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873*95 = 82935 4)
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Place the digits 1, 2, 3, 7, and 8 in the following boxes so that the greatest quotient is obtained.
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4)
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873/12 = 72.75 5)
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Place the digits 1, 2, 3, 7, and 8 in the following boxes so that the greatest product is obtained.
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5)
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731*82 = 59942 6)
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Without calculating, comment on the statement 2 ∙ 24 ≠ 3 ∙ 23.
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6)
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3 and 23 have no common factors with 2 and 24 so they can’t be equal 7)
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The product of two numbers is 50. If you divide the larger number by the smaller number you get 2. What are the numbers?
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7)
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xy=50 x/y=2So: x=2y2y^2=50y^2=25y = 5x = 2(5) = 10The numbers are 5 and 10
8)
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Without calculating, comment on the equation 34 ∙ 9 = 17 ∙ 18.
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8)
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17 is half of 34 and 18 is double of 9, so these are equal 9)
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Pam uses front-end estimation and adds 345, 211, 418 as 900 + (50 + 10 + 20) to get the answer 980. Pat rounds the numbers and adds 350 + 200 + 400 to get 950. Who has the better answer?
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9)
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Pam has the better answer, since it’s closer to the real answer of 974
10)
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Statement: If a number is divisible by 2 and by 3, then it is divisible by 6 and vice versa. Is this statement true? Give an example.
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10)
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Yes, that’s true.12 is divisible by 2 and 3 (and also 6)
11)
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Why is the clustering strategy of estimation not a good one to use for adding the numbers 42, 125, 214 and 900?
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11)
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The numbers are very far apart, so they don’t cluster around any central number.
12)
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During a class test the estimated answer to 141 ∙ 95 varied. One student said a second student said 140 ∙ 90 = 12,600, and a third student estimated the answer to be 141 ∙ 90 = 12,690. Who do you think has the best answer?
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12)
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The first student has the best answer, since it’s closest to the real answer of 13,395
13)
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While performing a calculation, you divide a number by 5 two times to get the answer 12. You should have divided by 5 only once. What is the correct result of the calculation?
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13)
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12*5 = 60The right answer is 60
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Use lattice multiplication to find the product.
14)
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222 × 172
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14)
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D 38184A)
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38,174
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B)
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38,194
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C)
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38,284
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D)
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38,184
Determine whether the situation requires an exact calculation or an estimate. 15)
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This week, the Laketown Cruise Company took its boat on 19 cruises, carrying the boat's full capacity of 46 guests on each cruise. If each guest paid $ 22 admission, then how much admission was collected by the company this week?
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15)
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ExactA)
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Exact calculation
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B)
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Estimate
Solve the problem. 16)
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Jane has invited 126 people for a pizza party. If each pizza has 18 slices and she estimates that she needs 3 slices per person, then how many pizzas does she need to order?
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16)
Roland E. Sprague Page 65
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B 21A)
Roland E. Sprague Page 66
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7
Roland E. Sprague Page 67
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B)
Roland E. Sprague Page 68
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21
Roland E. Sprague Page 69
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C)
Roland E. Sprague Page 70
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6
Roland E. Sprague Page 71
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D)
Roland E. Sprague Page 72
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42
Use the scratch method to find the sum. 17)
Roland E. Sprague Page 73
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18,555 + 89,328 + 2603
Roland E. Sprague Page 74
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17)
Roland E. Sprague Page 75
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B 110486A)
Roland E. Sprague Page 76
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109,486
Roland E. Sprague Page 77
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B)
Roland E. Sprague Page 78
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110,486
Roland E. Sprague Page 79
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C)
Roland E. Sprague Page 80
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108,481
Roland E. Sprague Page 81
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D)
Roland E. Sprague Page 82
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145,486
Perform the calculation mentally. 18)
Roland E. Sprague Page 83
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86 - 48
Roland E. Sprague Page 84
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18)
Roland E. Sprague Page 85
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C 38A)
Roland E. Sprague Page 86
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36
Roland E. Sprague Page 87
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B)
Roland E. Sprague Page 88
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37
Roland E. Sprague Page 89
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C)
Roland E. Sprague Page 90
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38
Roland E. Sprague Page 91
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D)
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39
Estimate the answer by rounding as indicated. 19)
Roland E. Sprague Page 93
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Estimate by rounding to the leftmost digit. 130 × 4823
Roland E. Sprague Page 94
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19)
Roland E. Sprague Page 95
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C 500,000A)
Roland E. Sprague Page 96
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400,000
Roland E. Sprague Page 97
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B)
Roland E. Sprague Page 98
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100,000
Roland E. Sprague Page 99
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C)
Roland E. Sprague Page 100
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500,000
Roland E. Sprague Page 101
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D)
Roland E. Sprague Page 102
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800,000
Solve the problem. 20)
Roland E. Sprague Page 103
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David's company has to ship 3199 boxes of sprinklers. If a truck can hold 550 boxes, how many trucks does he need to ship all the boxes?
Roland E. Sprague Page 104
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20)
Roland E. Sprague Page 105
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A 6A)
Roland E. Sprague Page 106
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6
Roland E. Sprague Page 107
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B)
Roland E. Sprague Page 108
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5
Roland E. Sprague Page 109
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C)
Roland E. Sprague Page 110
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7
Roland E. Sprague Page 111
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D)
Roland E. Sprague Page 112
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4
Roland E. Sprague Page 113
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Roland E. Sprague Page 114