1.   Find the difference.

6 tens − 4 tens = ___ tens
    A. 3 B. 2
    C. 0 D. 1
    Hint
  2.   Find the difference.

80 − 20 = ___
    A. 70 B. 60
    C. 50 D. 40
    Hint
  3.   Find the difference.

70 − 30 = ___
    A. 40 B. 30
    C. 20 D. 50
    Hint
  4.   Find the difference.

40 − 10 = ___
    A. 20 B. 30
    C. 10 D. 0
    Hint
  5.   Find the difference.

20 − 10 = ___
    A. 20 B. 0
    C. 10 D. 30
    Hint