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Try It Out -- Chapter 4, Lesson 1: Adding and Subtracting Using Mental Math


Numeric Response
 
 

Round to help you calculate each answer.
 

 1. 
48 + 19 = ____

 

 2. 
51 + 29 = ____

 

 3. 
84 - 17 = ____

 

 4. 
91 - 46 = ____

 

 5. 
70 - 12 = ____

 
 

Regroup to help you calculate each answer.
 

 6. 
73 - 17 = ____

 

 7. 
58 - 22 = ____

 

 8. 
44 + 66 = ____

 

 9. 
31 + 74 = ____

 

 10. 
63 + 37 = ____

 



 
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