Name ____________________

Date __________________

 

Estimate Sums and Differences

 

Lesson 1

 

Directions: Estimate the sum or difference of each problem. 

 

Problem:

58

- 16

 

Solution
Step 1:
           Round to the nearest ten 

58

- 16

 

Rounding 58 gives 60

Rounding 16 gives 20

 

Solution
Step 2
:           Subtract the tens.

 


60

- 20

40

 

 

Try two practice problems:

 

 A.  

 

44

+ 10

 

 

B.  

 

62

- 46

  



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