Subtraction with Regrouping: 285 − 17

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 285 − 17?

Answer

285 − 17 =
268

With regrouping: 1 borrow — from the tens

285 − 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.
7+10
2 8(was 8, now 7)5 (was 5, now 15)
−17
268

Column by column: 285 − 17

  • Ones: 5 is less than 7 — borrow 1 ten: tens 8 → 7; 15 − 7 = 8 — write 8.
  • Tens: after borrowing, 7; 7 − 1 = 6 — write 6.
  • Hundreds: nothing to subtract — write 2.

285 − 17 = 268

Second check: 285 − 268 = 17

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Recalculate with different values ↑

Column subtractions of 17

ExampleDifference
106 − 1789
109 − 1792
111 − 1794
115 − 1798
122 − 17105
153 − 17136
189 − 17172
200 − 17183
220 − 17203
256 − 17239
285 − 17268
300 − 17283
324 − 17307
365 − 17348
393 − 17376
419 − 17402
470 − 17453
502 − 17485
553 − 17536
595 − 17578

FAQ

What is 285 − 17?

285 − 17 = 268

How do you check that 285 − 17 = 268?

Add the difference and the subtrahend: 268 + 17 = 285. Getting the minuend back means the difference is right.

How many times do you borrow in 285 − 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