6th Grade Math Textbook, Progress

244 Chapter 7

Lessons 1–11

Estimate the sum or difference. (See pp. 224–225.)

1. 
   ^59
   
   ^37
   2.
   ^1145
   
   ^78
   3. 9
   ^16
    7
   ^12
   4. 12
   190
    11
   ^67
   

Add or subtract. Estimate to help. (See pp. 226–233.)

5. 
   ^12
   6.  4
   ^18
   7. 
   ^13
   8.  4
   ^57
   9. 5 10. 10


^13 
  6 
^38 
 
^14 
  1 
^27 
  1 
^12 
  02 
^34 

11. 14
    1
    3
    0
    ^1
    

1

3 
 12.^1 

3

8 
^19 

2

3 
 13.^10 ^1 
 1

1

0 
 14.^4 

3

7 
^1 

1

6 

15. 4
    
    1
    4
    ^1
    

1

2 
^2 

3

8 
 16.

1

8 
^3 

2

3 
^3 

7

8 
 17.^15 

3

8 
^9 

7

8 

Compute. Use mental math and the properties of addition. (See pp. 222–223, 234–235.)

18. 
    
    1
    4
    
    

1

4 
 19.^5 

1

6 
(3

1

2 
^3 

1

2 
) 20.^7 

1

4 
^3 

1

2 

Evaluate each expression for the given values. (See pp. 236–237.)

21. 7
    
    3
    8
    
    n, when n 3
    ^1
    8
    
    22. r 5
    ^1
    3
    
     2
    ^3
    5
    
    , when r 1
    ^2
    5
    
    


22. 7
    
    3
    4
    
    c 1
    ^1
    4
    
    d, when c 3
    ^2
    6
    
    and d 2
    ^3
    8
    
    

Solve and check. (See pp. 238–239.)

24. a
    
    1
    6
    
    +
    ^5
    6
    
     7
    ^1
    3
    
    25. 3
    ^3
    7
    
    y 8
    ^2
    3
    
    26. w 8
    ^3
    4
    
     9
    
    1

7

2

27. A stock rose 3
    ^14
    points on Tuesday.
    It fell 1
    ^34
    points on Wednesday. On
    Thursday the stock rose 4
    ^18
    points.
    By Friday the stock was worth 28
    ^12
    
    points. How much was the stock
    worth on Monday?
    28. A veterinarian recommended that Troy
    put his cat on a diet. The first week
    the cat lost 1
    
    3
    4
    
    lb. The second week
    she gained
    
    1
    2
    
    lb. The third and fourth
    weeks she lost 2
    
    3
    4
    
    lb each. If the cat’s
    weight after four weeks was 12 lb,
    how much did the cat weigh before
    the diet began?

(See pp. 240–243.)

(See Still More Practice,p. 525.)

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