1.   Find the missing numbers.

9 + 5 = ___

___ − 9 = 5
    A. 14 B. 15
    C. 16 D. 13
    Hint
  2.   Find the missing numbers.

7 + 3 = ___

___ − 7 = 3
    A. 11 B. 10
    C. 9 D. 12
    Hint
  3.   Find the missing numbers.

9 + 8 = ___

___ − 9 = 8
    A. 18 B. 17
    C. 16 D. 15
    Hint
  4.   Find the missing numbers.

6 + 3 = ___

___ − 6 = 3
    A. 8 B. 7
    C. 10 D. 9
    Hint
  5.   Find the missing numbers.

4 + 6 = ___

___ − 4 = 6
    A. 10 B. 9
    C. 11 D. 8
    Hint