7th Grade Math

194 Rational Numbers

Practice

Chapter Test

20. 
    

    FINANCIAL LITERACY (^) Fraction
    of Check
    How Spent
    or Saved
    ^25 baseball cardsSpent on
    ^14 Spent on a CD
    (^207) savings accountDeposited into
    For his birthday,
    Keith received a
    check from his
    grandmother. Of
    this amount, the
    table shows how he
    spent or saved the
    money. Two weeks later, he withdrew
    ^2
    3
    of the amount he had deposited
    into his savings account. What fraction in
    simplest form of the original check did he
    withdraw from his savings account?

    
    


21. 
    

    MEASUREMENT An ounce is ^1
    16
    of a pound.
    How many ounces are in 8 ^3
    4
    pounds?

    
    

Simplify each expression.

22. c^7 × c–^2 23. m–^5 × m^8


23. 4 g^10 × 3 g–^5 25. 8 v–^4 × 5 v^6


24. SOLAR SYSTEM The distance from Earth to
    the Sun is 9.3 × 10 7 miles. What is this
    distance in standard form?


25. EXTENDED
    Student

Distance

Around

Head (in.)

Max 17.5

Juan 17 _^38

Hue 16 _^78

Kobe 17.25

Martha 16.8

RESPONSE For

a measurement

experiment in class,

students measured

the distance around

their heads. The chart

shows the results for

part of the class.

Part A Which student had the greatest

head size?

Part B Which student had the least

head size?

Part C Arrange the head sizes in order

from least to greatest.

Write each fraction or mixed number as a

decimal. Use bar notation if the decimal is a

repeating decimal.

1. ^79 2. 4 85 3. _ 10091

Write each decimal as a fraction in simplest

form.

4. 0.84 5. 0.006 6. 0.42

Replace each ● with <, >, or = to make a

true sentence.

7. 
   
   
   
   • ^2
     3
     ● ^4
     7
     8. 3 ^5
     8
     ● 3 ^3
     5
     9. _^11
     20
     ● 0.55
   
   
   
   

Add, subtract, multiply, or divide. Write in

simplest form.

10. 
    
    
    
    • _^4
      15
      
      
      • ^8
        15
        11. ^7
        10
        
        
        • _^16
        
        
        
        
      
      
      
      
    
    
    
    


11. 
    

    ^58 + 52 13. 6 + _^8
    21

    
    


12. 
    
    
    
    • 4 _^5
      12
      
      
      • 2 121 15. 6 97 + 3 _^5
        12
      
      
      
      
    
    
    
    


13. 
    

    8 ^47 - 1 ^5
    14

    
    


14. 
    

    4 65 - (^) (- 1 ^23 )

    
    


15. 
    

    MULTIPLE CHOICE Use the diagram to find
    the total distance Joe drove.

    
    

+PF #BOL

5 mi^34

6 mi

4 mi

1BSL 0GGJDF1PTU

1

3

5

6

A. 15 _^9

13

miles C. _^11

12

mile

B. _^7

12

mile D. 16 _^11

12

miles

19. SPORTS Tyler’s football practice lasted
    2 ^12 hours. If ^14 of the time was spent catching
    passes, what fraction of time was spent
    catching passes? Write in simplest form.

190_194_SGR_895130.indd 194 12/31/09 12:51 PM