Computation & Estimation

Math 7

Note

• On an SOL test students would not be allowed to use calculators for this section.

Harrison is buying a bicycle for $340. What amount of sales tax must he pay if the sales tax rate is 7%?

A. $7.00

B. $23.80

C. $24.60

D. $238.00

25% 25% 25% 25% 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 $7.00

14 15 $23.80

16 17 $24.60

18 19 20 $238.00

Jack spent 30% of the money he earned mowing lawns last summer. If Jack spent $45, what was the total amount of money he earned mowing lawns last summer?

25% 25% 25% 25%

A. $15 B. $75 C. $150 D. $195

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 $15 14 15 $75 16 17 18 $150 19 20 $195

Mike is making a scale model of his favorite car. The actual car is 8 feet long and 4 feet wide. Mike wants his model to be 12 inches in length. Which could be used to find the width of his model if he uses the same ratio?

A.

B.

25% 25% 25% 25%

C.

D.

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 A 15 16 B 17 18 C 19 D 20

Anita put $3,000 in a savings account. The account earns an annual interest rate of 3.5%. How much interest will Anita earn after her money has been in the account for one year?

25% 25% 25% 25%

A. $105 B. $350 C. $1,050 D. $2,650

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 $105 15 16 $350 17 18 $1,050 19 20 $2,650

Joe knows a 5-pound turkey breast will feed 8 people. If 20 people are coming to Joe’s home for dinner, at this rate how many pounds of turkey breast will he need?

A. 7.5 lbs B. 12.5 lbs C. 17 lbs D. 32 lbs

25% 25% 25% 25% 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 7 .5

lb s 15 1 16 2.

5 lb s 17 1 7 18 s 19 3 2 lb s 20

A dolphin is 30 feet below the surface of the water. She rises 23 feet, sinks 17 feet, and finally rises another 27 feet. If there are no other changes, the dolphin is —

A. 3 feet above the surface of the water B. 3 feet below the surface of the water

25% 25% 25% 25%

C. 63 feet above the surface of the water

1

D. 63 feet below the surface of the

2

water

3 4 5 6 7 8 9 10 11 12 13 3 14 fe et a bo ve th e 15 3 su fe rfa et ce b ..

elo w 16 th e s 6 3 ur fa fee ce 17 ..

bo ve th 6 e su 18 3 rfa fee c..

t b el .

ow th 19 e s ur fa c..

.

20 21 22 23 24 25 26 27 28 29 30

Use the number line to complete the sentence. The value of y/z will be —

A. negative because both y and z are negative B. positive because both y and z are negative

25% 25% 25% 25%

C. negative because z is farther from 0 than y

1

D. positive because y is closer to 0 than z

2 3 4 5 6 7 8 9 10 11 12 13 14 n eg at iv e bec 15 au se p bo os th iti y.

16 ..

be ca us n e bo 17 eg at th iv y.

e ..

bec au se 18 p z i os s f iti ar ve ...

be ca 19 us e y i s c lo s..

20 21 22 23 24 25 26 27 28 29 30

Ralph’s map of Virginia Beach uses a scale of 1 inch for every 7 miles. Ralph runs a distance of 13.2 miles from his house in Virginia Beach every weekend. Which is closest to the number of inches needed to represent this distance on Ralph’s map?

A. 7.2 inches B. 7.0 inches C. 6.2 inches D. 1.9 inches

25% 25% 25% 25% 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 15 16 7 .2

in ch es 17 7 .0

in ch es 18 6 .2

in ch es 19 20 1 .9

in ch es

Max surveyed students on his website and asked each to select 1 favorite after-school activity. The percents of the total number of students who responded for each activity are shown in the table. If 126 students selected watching movies, how many total students responded to Max’s survey?

25% 25% 25% 25%

A. 108 B. 144 C. 700 D. 2,268

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 15 16 108 17 144 18 700 19 20 2268

A jug of drinking water contained 1½ gallons. After one day, ⅝ gallon had been used. How much water was left in the jug?

A. ½ gallon B. ⅞ gallon C. 1 ⅔ gallons D. 1 ⅛ gallons

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 15 16 17 18 19 20

Kevin mixes paint using 8 ounces of yellow paint for every 3 ounces of white paint. At this rate, how many ounces of white paint would be mixed with 24 ounces of yellow paint?

A. 8 B. 9 C. 19 D. 64

25% 25% 25% 25% 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 15 8 16 17 9 18 19 19 20 64

Lynne loaned $480 to a friend. The friend paid back the amount borrowed plus 10% interest. What was the total amount the friend paid to Lynne?

A. $480.10

B. $484.80

C. $490.00

D. $528.00

25% 25% 25% 25% 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 $480.10

15 16 $484.80

17 18 $490.00

19 20 $528.00

Eli can type 1 page in 10 minutes. How many total pages can he type in one hour?

25% 25% 25% 25%

A. 1 B. 6 C. 10 D. 60

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 1 13 14 6 15 16 17 10 18 19 60 20

The change in the number of students enrolled at a school over six months is shown in the following table. The number of students enrolled at the end of September was 4,327. What was the number of students enrolled in the school at the end of March?

25% 25% 25% 25%

A. 4,275 B. 4,300 C. 4,325 D. 4,352

1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 11 12 13 14 4275 15 16 4300 17 18 4325 19 4352 20