1.   Round each number to the nearest ten. Estimate the difference.

   
    A. 40 B. 20
    C. 10 D. 30
    Hint
  2.   Round each number to the nearest ten. Estimate the difference.

   
    A. 20 B. 40
    C. 30 D. 10
    Hint
  3.   Find 6 − 1.
    A. 4 B. 5
    C. 3 D. 2
    Hint
  4.   Find 9 − 4.
    A. 7 B. 5
    C. 6 D. 4
    Hint
  5.   Find the difference.

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

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

79 − 50 = ___
   
    A. 39 B. 49
    C. 29 D. 19
    Hint
  8.   Find the difference.

32 − 20 = ___
   
    A. 32 B. 22
    C. 10 D. 12
    Hint
  9.   Find the difference.

43 − 4 = ___
   
    A. 38 B. 37
    C. 39 D. 40
    Hint
  10.   Find the difference.

36 − 1 = ___
   
    A. 37 B. 34
    C. 33 D. 35
    Hint
  11.   Find the difference.
    A. 49 B. 51
    C. 48 D. 50
    Hint
  12.   Find the difference.
    A. 31 B. 32
    C. 30 D. 33
    Hint
  13.   Find the difference.
    A. 28 B. 25
    C. 26 D. 27
    Hint
  14.   Find the difference.
    A. 20 B. 26
    C. 36 D. 28
    Hint
  15.   Which addition problem checks the subtraction problem?
    A. B.
    C. D.
    Hint
  16.   Which addition problem checks the subtraction problem?
    A. B.
    C. D.
    Hint