7th Grade Math

EP6 Extra Practice

Extra Practice

Multi-Part Lesson 2-3: Multiply and Divide Integers

PART A PAGES 100–101

Solve using the look for a pattern strategy.

1. NUMBERS Determine the next three
   numbers in the pattern below.
   15, 21, 27, 33, 39, ...


2. MONEY The table shows Abigail’s
   savings. If the pattern continues,
   what will be the total amount
   in week 6?

Week Total ($)

1 $400

2 $800

3 $1,200

4 $1,600

5 $2,000

6 

2. TIME Determine the next two times in
   the pattern below.
   2:30 a.m., 2:50 a.m., 3:10 a.m., 3:30 a.m., ...


3. SCIENCE A single rotation of Earth
   takes about 24 hours. Copy and
   complete the table to determine the
   number of hours in a week.

Number of Days Number of Hours

124

248

372

4 

5 

6 

7 

PARTS B C PAGES 102–108

Multiply.

1. 5 (- 2 ) 2. 6 (- 4 ) 3. 4 ( 21 ) 4. - 11 (- 5 )


2. 
   
   
   
   • 6 ( 5 ) 6. - 50 ( 0 ) 7. - 5 (- 5 ) 8. - 4 ( 8 )
   
   
   
   


3. (-6)^2 10. (-2)^2 11. (-4)^3 12. (-5)^3
   ALGEBRA Evaluate each expression if a = - 5, b = 2, c = - 3, and d = 4.


4. 
   
   
   
   • 2 d 14. 6 a 15. 3 ab 16. - 12 d
   
   
   
   


5. 
   
   
   
   • 4 b^2 18. - 5 cd 19. a^2 20. 13 ab
   
   
   
   

PART D PAGES 109–113

Divide.

1. 4 ÷ (- 2 ) 2. 16 ÷ (- 8 ) 3. - 14 ÷ (- 2 ) 4. _^328


2. 18 ÷ (- 3 ) 6. - 18 ÷ 3 7. 8 ÷ (- 8 ) 8. 0 ÷ (- 1 )


3. 
   
   
   
   • 25 ÷ 5 10. _--^147 11. - 32 ÷ 8 12. - 56 ÷ (- 8 )
   
   
   
   


4. 
   
   
   
   • 81 ÷ 9 14. - 42 ÷ (- 7 ) 15. 121 ÷ (- 11 ) 16. - 81 ÷ (- 9 )
   
   
   
   

ALGEBRA Evaluate each expression if a = - 2, b = - 7, x = 8, and y = - 4.

17. 
    
    
    
    • 64 ÷ x 18. _^16 y 19. x ÷ 2 20. _a 2
    
    
    
    


18. ax ÷ y 22. _bxy 23. 2 y ÷ 1 24. _ayx


19. -y ÷ a 26. x^2 ÷ y 27. _ab 1 28.

xy

_a

EP2_EP36_ExtPract_M1_895130.indd EP6 1/6/10 11:46 AM