6th Grade Math Textbook, Progress

Match each exercise to its estimated sum

or difference in the box.

1. 
   ^15
   
   ^89
   2.
   ^67
   
   ^1112
   a. 1  1  2 b. 1 
   ^12
   
   ^12
   


2. 
   190
   
   ^58
   4.
   163
   
   188
   c.
   ^12
   
   ^12
    0 d. 0  1  1

Estimate the sum or difference.

5. 
   11
   1 
   ^49
   6.
   
   1
   1

5

6





1

1

0


 7. 
^2

9 


5

6 
 8.


^1

1

1

2



^1

1

2

4 

9. 
   175
   
   110
   10.
   ^1280
   
   ^1234
   11.
   131
   
   ^16
   12.
   ^19
   
   140
   


10. 
    190
    
    ^16
    
    ^38
    14.
    ^19
    
    ^17
    
    ^12
    15.
    
    1
    1

5

6 


5

8



^4

9





2

3

5

Estimate with Mixed Numbers

To estimate the sum (or difference) of mixed numbers:


Round each mixed number to the nearest whole number.


Add (or subtract) the rounded numbers.

 8 


1

5 
 ^08 ^15 .

1

2 
. ^16

 9 


5

8 
 ^10 ^09 
 1

9

0 
 ^10




5

8 
^9 ^18 
 1

9

0 
^09 ^06

Estimate the sum or difference.

16.  7
    
    2
    3
    
    17.  9 .
    ^1
    3
    
    18.  16
    ^1
    8
    
    19.  12 .
    ^1
    2
    
    20.  10
    ^1
    6
    
    

 4 


3

4 
 ^3 
 1

5

2 
 ^13 

8

9 
 ^04 
 1

7

0 
 ^09 

8

9 

21. 15
    
    3
    4
    
    1

9

0 
 22.^19 
 1

2

5 


6

7 
 23.^12 

3

5 


1

1

0

2 
^9 
 1

8

5 

24. Antonio needs at least 15 pounds of chicken for a dinner
    party. He buys three packages: 3
    
    1
    4
    lb, 4
    

3

7 
lb, and 5

2

3 
lb.

Will this be enough chicken? Explain.

estimated

sum

estimated

difference

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