Difference between 8.2 and 1.385

Vertically align numbers with Larger Number on top:
8 . 2 0 0
1 . 3 8 5

Subtract using place value:

Ones Tenths Hundredths Thousandths
11 9
7 1 10 10
8.2 8 . 2 0 0
1.385 1 . 3 8 5
Difference 6 . 8 1 5
Column traversal from right to left
Thousandths column:
  • Since 0 is less than 5, we have to borrow 1 from the Hundredths column
  • As a result, 0 becomes 10, and 10 − 5 = 5
  • The 0 in the Hundredths column becomes 9 after borrowing 1 from its regrouped value of 10

Hundredths column:

  • 9 − 8 = 1
  • Because it was the first nonzero digit to the left of the 0 in the Thousandths column, the 2 in the Tenths column became 1 after 1 was borrowed for the purpose of regrouping the 0 in the Hundredths column (borrowing across a 0)

Tenths column:

  • Since 1 is less than 3, we have to borrow 1 from the Ones column
  • As a result, 1 becomes 11, and 11 − 3 = 8
  • The 8 in the Ones column becomes 7

Ones column:

  • 7 − 1 = 6
11 9
7 1 10 10
8 . 2 0 0
1 . 3 8 5
6 . 8 1 5
Therefore, the Difference between 8.2 and 1.385 is 6.815

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

1 1 1
6 . 8 1 5
1 . 3 8 5
8 . 2 0 0

Sum of Difference and Smaller Number = 8.2 (trailing zeros are dropped)
Sum of Difference and Smaller Number = Larger Number (8.2 = 8.2) ✓

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

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