1.   Count on to add. You can use the number line.

3 + 9 = ___

   
    A. 10 B. 13
    C. 11 D. 12
    Hint

  2.   Count on to add. You can use the number line.

6 + 1 = ___

   
    A. 7 B. 8
    C. 5 D. 9
    Hint

  3.   Count on to add. You can use the number line.

3 + 2 = ___

   
    A. 4 B. 6
    C. 5 D. 7
    Hint

  4.   Count on to add. You can use the number line.

14 + 1 = ___

   
    A. 13 B. 12
    C. 16 D. 15
    Hint

  5.   Count on to add. You can use the number line.

___ = 11 + 1

   
    A. 12 B. 13
    C. 10 D. 9
    Hint