Difference between 78 and 42

Vertically align numbers with Larger Number on top:
7 8
4 2

Subtract using place value:

Tens Ones
78 7 8
42 4 2
Difference 3 6
Column traversal from right to left
Ones column:
  • 8 − 2 = 6

Tens column:

  • 7 − 4 = 3
7 8
4 2
3 6
Therefore, the Difference between 78 and 42 is 36

Check computation by comparing Larger Number and the Sum of Smaller Number and Difference:

4 2
3 6
7 8

Sum of Smaller Number and Difference = 78
Sum of Smaller Number and Difference = Larger Number (78 = 78) ✓

The solution above and other related solutions were provided by the Difference Between Two Numbers Application.

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