Subtraction with Regrouping: 109 − 17

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 109 − 17?

Answer

109 − 17 =
92

With regrouping: 1 borrow — from the hundreds

109 − 17 in a column. Above the columns: the values after borrowing — a crossed-out digit is replaced by the number above it; +10 marks a column that received a borrowed ten.
0+10
1(was 1, now 0)0 (was 0, now 10)9
−17
92

Column by column: 109 − 17

  • Ones: 9 − 7 = 2 — write 2.
  • Tens: 0 is less than 1 — borrow 1 hundred: hundreds 1 → 0; 10 − 1 = 9 — write 9.
  • Hundreds: after borrowing, 0 — a leading zero is not written.

109 − 17 = 92

Second check: 109 − 92 = 17

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Recalculate with different values ↑

Column subtractions of 17

ExampleDifference
82 − 1765
84 − 1767
86 − 1769
88 − 1771
91 − 1774
93 − 1776
95 − 1778
100 − 1783
102 − 1785
106 − 1789
109 − 1792
111 − 1794
115 − 1798
122 − 17105
153 − 17136
189 − 17172
200 − 17183
220 − 17203
256 − 17239
285 − 17268

FAQ

What is 109 − 17?

109 − 17 = 92

How do you check that 109 − 17 = 92?

Add the difference and the subtrahend: 92 + 17 = 109. Getting the minuend back means the difference is right.

How many times do you borrow in 109 − 17?

1 borrow: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also