Question 1

Estimate by rounding as directed.
-59.027 - 2.8622; nearest one
A) 57
B) 56.1
C) 56
D) 56.2

Accepted Answer

When rounding 59.027 to the nearest one, it becomes 59. When rounding 2.8622 to the nearest one, it becomes 3. Subtracting 3 from 59 gives 56.

Question 2

Estimate the product by first rounding each number so that there is one nonzero digit.
-$26.7 \times 4.8$
A) 1500
B) 15,000
C) 150
D) 15

Accepted Answer

Rounding each number to one nonzero digit, $26.7$ rounds to $30$ and $4.8$ rounds to $5$. Multiplying these gives $30 \times 5 = 150$.

Question 3

Estimate the product by first rounding each number so that there is one nonzero digit.
-$7.1 \times 35$
A) 2800
B) 28
C) 280
D) 400

Accepted Answer

Rounding 7.1 to 7 and 35 to 40, the estimated product is $7 \times 40 = 280$.

Question 4

Estimate the product by first rounding each number so that there is one nonzero digit.
-$26 \times 55$
A) 1800
B) 180
C) 3600
D) 18

Accepted Answer

Rounding each number to one nonzero digit, 26 rounds to 30 and 55 rounds to 60. Multiplying these rounded numbers gives $30 \times 60 = 1800$.

Question 5

Estimate the product by first rounding each number so that there is one nonzero digit.
-$8.329 \times 8.01$
A) 80
B) 640
C) 6.4
D) 64

Accepted Answer

Rounding each number to one nonzero digit, $8.329$ rounds to $8$ and $8.01$ rounds to $8$. Multiplying these gives $8 \times 8 = 64$.

Question 6

Estimate the product by first rounding each number so that there is one nonzero digit.
-$0.032 \times 449.6$
A) 1200
B) 1.2
C) 120
D) 12

Accepted Answer

The answer of Estimate the product by first rounding each...

Question 7

Estimate the product by first rounding each number so that there is one nonzero digit.
-$1.9 \times 3.84$
A) 8
B) 3
C) 0.3
D) 0.8

Accepted Answer

Rounding each number to one nonzero digit, 1.9 rounds to 2 and 3.84 rounds to 4. Multiplying these gives 2 x 4 = 8.

Question 8

Estimate the product by first rounding each number so that there is one nonzero digit.
-$78.59 \times 18.27$
A) 1610
B) 2000
C) 1600
D) 160

Accepted Answer

Rounding 78.59 to one nonzero digit gives 80, and rounding 18.27 to one nonzero digit gives 20. Multiplying these gives $80 \times 20 = 1600$.

Question 9

Estimate the product by first rounding each number so that there is one nonzero digit.
-$2.49 \times 420.2$
A) 800
B) 880
C) 1000
D) 400

Accepted Answer

Rounding 2.49 to 2 and 420.2 to 400, the estimated product is $2 \times 400 = 800$.

Question 10

Estimate the quotient by first rounding each number as indicated.
-$10.12 \div 2$; Estimate by first rounding each number to the nearest one.
A) 5
B) 0.5
C) 50
D) 0.05

Accepted Answer

Rounding 10.12 to the nearest one gives 10, and rounding 2 to the nearest one gives 2. Therefore, $10 \div 2 = 5$.

Question 11

Estimate the quotient by first rounding each number as indicated.
-$0.0831 \div 1.78$; Estimate by first rounding each number to one nonzero digit.
A) 5
B) 0.5
C) 0.04
D) 0.004

Accepted Answer

Rounding $0.0831$ to one nonzero digit gives $0.08$ (or $8 \times 10^{-2}$), and rounding $1.78$ to one nonzero digit gives $2$ (or $2 \times 10^0$). The estimated quotient of $0.08 \div 2$ is $0.04$.

Question 12

Estimate the quotient by first rounding each number as indicated.
-$92.19 \div 27.6$; Estimate by first rounding each number to the nearest ten.
A) 30
B) 5
C) 3
D) 0.3

Accepted Answer

The answer of Estimate the quotient by first rounding each...

Question 13

Estimate the quotient by first rounding each number as indicated.
-$948 \div 0.119$; Estimate by first rounding each number to one nonzero digit.
A) 900
B) 90
C) 9
D) 9000

Accepted Answer

Rounding 948 to one nonzero digit gives 900, and rounding 0.119 to one nonzero digit gives 0.1. Estimating the quotient then gives $900 \div 0.1 = 9000$.

Question 14

Solve the problem.
-At the beginning of the summer, Jon was 52.5 inches tall. By the end of the summer, he had grown 1.3 inches. What was his height at the end of the summer?
A) $65.5 \mathrm{in}$.
B) 53.8 in.
C) 52.8 in.
D) $53.9 \mathrm{in.}$

Accepted Answer

Jon's height at the end of the summer is the sum of his initial height and his growth over the summer, which is $52.5 \mathrm{in} + 1.3 \mathrm{in} = 53.8 \mathrm{in}$.

Question 15

Solve the problem.
-Jane bought 2 items at Lucky Pete's market. She bought a pound of butter for $1.76 and a gallon of milk for $2.66. What was the total amount that she paid for both of these items?
A) $\$ 4.32$
B) $\$ 3.32$
C) $\$ 3.42$
D) $\$ 4.42$

Accepted Answer

The total amount is calculated by adding the cost of the butter ($1.76) and the milk ($2.66), which equals $4.42.

Question 16

Solve the problem.
-Jerry's subtotal at Scramble's Electronics is $13.92. The sales tax on these items is $1.92. What was Jerry's total bill?
A) $\$ 15.74$
B) $\$ 14.74$
C) $\$ 14.84$
D) $\$ 15.84$

Accepted Answer

Jerry's total bill is the subtotal plus the sales tax: $13.92 + $1.92 = $15.84.

Question 17

Solve the problem.
-Bonny wanted to know the total number of hours she worked this week. Her time card indicated the following hours: Monday, 2.18 hours; Tuesday, 6.49 hours; Thursday, 4.09 hours. How many hours has Bonny worked?
A) $11.76 \mathrm{hr}$
B) $12.76 \mathrm{hr}$
C) $12.66 \mathrm{hr}$
D) $13.76 \mathrm{hr}$

Accepted Answer

To find the total number of hours Bonny worked, add the hours from each day: 2.18 + 6.49 + 4.09 = 12.76 hours.

Question 18

Solve the problem.
-Mr. Lee wanted to keep track of how far he was driving today. He drove to Lodi which was 31.19 miles, then he drove to Merced which was 26.13 miles, then he drove home which was 8.09 miles. How far did Mr. Lee drive?
A) $66.41 \mathrm{mi}$
B) $65.41 \mathrm{mi}$
C) $66.40 \mathrm{mi}$
D) $65.40 \mathrm{mi}$

Accepted Answer

To find the total distance Mr. Lee drove, add the distances: 31.19 miles + 26.13 miles + 8.09 miles = 65.41 miles.

Question 19

Solve the problem.
-Mrs. Campbell prepared her grocery list at home. Her list contained the following items with their sale prices: cheese - $3.92; crackers - $17.87; soda - $1.01; hamburger - $17.92; and gum - $0.92. She bought all of the items at the store except the crackers. How much money did she spend?
A) $\$ 23.64$
B) $\$ 22.77$
C) $\$ 23.77$
D) $\$ 24.64$

Accepted Answer

The answer of Solve the problem.
-Mrs. Campbell prepared her grocery...

Question 20

Solve the problem.
-Mr. Bertini took a plane trip for a total of 9.20 hours. He watched an in-flight movie for 2.72 hours. From the airport, he took a cab ride for 0.30 hour to the train station. Next, he took the train home for 1.30 hours. what was the total time spent traveling?
A) $13.52 \mathrm{hr}$
B) $10.80 \mathrm{hr}$
C) $10.52 \mathrm{hr}$
D) $9.80 \mathrm{hr}$

Accepted Answer

The answer of Solve the problem.
-Mr. Bertini took a plane...

Quiz 3: Decimal Notation

Estimate by rounding as directed. -59.027 - 2.8622; nearest one

Estimate the product by first rounding each number so that there is one nonzero digit. - $26.7 \times 4.8$

Estimate the product by first rounding each number so that there is one nonzero digit. - $7.1 \times 35$

Estimate the product by first rounding each number so that there is one nonzero digit. - $26 \times 55$

Estimate the product by first rounding each number so that there is one nonzero digit. - $8.329 \times 8.01$

Estimate the product by first rounding each number so that there is one nonzero digit. - $0.032 \times 449.6$

Estimate the product by first rounding each number so that there is one nonzero digit. - $1.9 \times 3.84$

Estimate the product by first rounding each number so that there is one nonzero digit. - $78.59 \times 18.27$

Estimate the product by first rounding each number so that there is one nonzero digit. - $2.49 \times 420.2$

Estimate the quotient by first rounding each number as indicated. - $10.12 \div 2$ ; Estimate by first rounding each number to the nearest one.

Estimate the quotient by first rounding each number as indicated. - $0.0831 \div 1.78$ ; Estimate by first rounding each number to one nonzero digit.

Estimate the quotient by first rounding each number as indicated. - $92.19 \div 27.6$ ; Estimate by first rounding each number to the nearest ten.

Estimate the quotient by first rounding each number as indicated. - $948 \div 0.119$ ; Estimate by first rounding each number to one nonzero digit.

Solve the problem. -At the beginning of the summer, Jon was 52.5 inches tall. By the end of the summer, he had grown 1.3 inches. What was his height at the end of the summer?

Solve the problem. -Jane bought 2 items at Lucky Pete's market. She bought a pound of butter for $1.76 and a gallon of milk for $2.66. What was the total amount that she paid for both of these items?

Solve the problem. -Jerry's subtotal at Scramble's Electronics is $13.92. The sales tax on these items is $1.92. What was Jerry's total bill?

Solve the problem. -Bonny wanted to know the total number of hours she worked this week. Her time card indicated the following hours: Monday, 2.18 hours; Tuesday, 6.49 hours; Thursday, 4.09 hours. How many hours has Bonny worked?

Solve the problem. -Mr. Lee wanted to keep track of how far he was driving today. He drove to Lodi which was 31.19 miles, then he drove to Merced which was 26.13 miles, then he drove home which was 8.09 miles. How far did Mr. Lee drive?

Solve the problem. -Mr. Bertini took a plane trip for a total of 9.20 hours. He watched an in-flight movie for 2.72 hours. From the airport, he took a cab ride for 0.30 hour to the train station. Next, he took the train home for 1.30 hours. what was the total time spent traveling?

Quiz 3: Decimal Notation

Estimate by rounding as directed. -59.027 - 2.8622; nearest one

Estimate the product by first rounding each number so that there is one nonzero digit. - 26.7×4.826.7 \times 4.826.7×4.8

Estimate the product by first rounding each number so that there is one nonzero digit. - 7.1×357.1 \times 357.1×35

Estimate the product by first rounding each number so that there is one nonzero digit. - 26×5526 \times 5526×55

Estimate the product by first rounding each number so that there is one nonzero digit. - 8.329×8.018.329 \times 8.018.329×8.01

Estimate the product by first rounding each number so that there is one nonzero digit. - 0.032×449.60.032 \times 449.60.032×449.6

Estimate the product by first rounding each number so that there is one nonzero digit. - 1.9×3.841.9 \times 3.841.9×3.84

Estimate the product by first rounding each number so that there is one nonzero digit. - 78.59×18.2778.59 \times 18.2778.59×18.27

Estimate the product by first rounding each number so that there is one nonzero digit. - 2.49×420.22.49 \times 420.22.49×420.2

Estimate the quotient by first rounding each number as indicated. - 10.12÷210.12 \div 210.12÷2 ; Estimate by first rounding each number to the nearest one.

Estimate the quotient by first rounding each number as indicated. - 0.0831÷1.780.0831 \div 1.780.0831÷1.78 ; Estimate by first rounding each number to one nonzero digit.

Estimate the quotient by first rounding each number as indicated. - 92.19÷27.692.19 \div 27.692.19÷27.6 ; Estimate by first rounding each number to the nearest ten.

Estimate the quotient by first rounding each number as indicated. - 948÷0.119948 \div 0.119948÷0.119 ; Estimate by first rounding each number to one nonzero digit.