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2nd Grade Operations and Algebraic Thinking- Add and subtract within 20, Standard 2, Pre Test 1
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.


Completion
Complete each statement.
 

 1. 
   9
+ 7
 

 

 2. 
   7
+ 4
 

 

 3. 
   17
-   9
 

 

 4. 
   14
-   6
 

 

 5. 
   13
-   8
 

 

 6. 
   8
+ 3
 

 

 7. 
   3
+ 9
 

 

 8. 
   8
+ 8
 

 

 9. 
   2
+ 7
 

 

 10. 
   5
+ 6
 

 

 11. 
8 + 5 = 8 + 2 + 3 = 10 + ____=  13.
 

 

 12. 
19 - 10 = 19 - 9 - 1 = _____.
 

 

 13. 
20 - 11 = 20 - 10 - ____ = 9.
 

 

 14. 
6 + 9 = 6 + 6 + 3 = _____
 

 

 15. 
7 + 9 = 16, therefore, 16 - 7 = ____
 

 



 
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