SOL 7.1/7.2 Quiz Review

Ordering Numbers

100

Which number is larger?

2/5  or   25%

2/5

200

Which number is smaller?

.045     or       45%

.045

300

Order these numbers from least to greatest:

1/10      15%        .11       9.5%  

9.5%     1/10    .11    15%

400

Place these numbers in DESCENDING order

65%      .74        8.2 x 10 ^-1      7/10  

8.2 x 10 ^-1     .74       7/10       65%

500

Place these numbers in ASCENDING order:

4.3 x 10 ^-2     1/20      .45      .5%

.5%    4.3 x 10 ^-2    1/20      .45

Powers of 10

100

What is 10⁵ in standard form?

100,000

200

Write 10⁷ in EXPANDED form

10 x 10 x 10 x 10 x 10 x 10 x 10

300

What is the EXPONENTIAL form for .0001?

10 ^-4

400

What is the EXPANDED form for 10 ^-6?

1/10 x 1/10 x 1/10 x 1/10 x 1/10 x 1/10

500

List all the ways you can express 10^-3

.001   1/10³   1/10 x 1/10 x 1/10   1/1000

Scientific Notation

100

Which is correctly written in scientific notation?

A) 44 x 10 ⁴

B) 17.3 x 10 ^-5

C) 1.5 x 10

D) 6.4 x 10 ⁵

D) 6.4 x 10⁵

200

True or False: In scientific notation, the exponent ALWAYS tells us how many zeros are in the number.

False

300

What is 2.7 x 10 ⁶ in STANDARD form?

2,700,000

400

Place in ascending order:

9 x 10³

8.35 x 10⁵

7.192 x 10²

6.42 x 10²

1) 6.42 x 10²

2) 7.192 x 10²

3) 9 x 10³

4) 8.35 x 10⁵

500

Put the following in descending order: 

2.5 x 10³

3.7 x 10^-1

9.2 x 10⁰

1.5 x 10^-1

1) 2.5 x 10³

2) 9.2 x 10⁰

3) 3.7 x 10^-1

4) 1.5 x 10^-1

Absolute Value

100

Fill in the Blank: Absolute value is ALWAYS ___________

Positive

200

Fill in the blank: The absolute value of a number is its ________ ____ ___ on a number line

Distance from zero

300

Solve: | -4 |

4

400

Evaluate: | 235 |

235

500

What number would have the same absolute value as 27? 

-27

Word Problems

100

The temperature at 2pm was 81^o. If the temperature drops at a rate of 2^o per hour, what will the temperature be at 9pm? 

67^o

200

If it is 5^o outside, and the temperature will drop 12 degrees over the next few hours, what will the temperature be? 

-7^o

300

The 7th grade team had a pizza party. There are 126 students in the whole grade. If each pizza has 8 pieces, and each student will eat two slices, about how many pizzas should the team buy? Round your answer to the nearest whole number.

32

400

A diver is 25 feet below sea level. A parasailer is at 100 feet above sea level. How far apart are the diver and the parasailer? 

125 feet apart

500

A deep-sea exploring ship is pulling up a diver at a rate of 15 feet per minute. If the diver was at 500 feet below sea level 20 minutes ago, what is his depth now?

200 feet below sea level