Subtraction with Regrouping: 691 − 172

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 691 − 172?

Answer

691 − 172 =
519

With regrouping: 1 borrow — from the tens

691 − 172 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.
8+10
6 9(was 9, now 8)1 (was 1, now 11)
−172
519

Column by column: 691 − 172

  • Ones: 1 is less than 2 — borrow 1 ten: tens 9 → 8; 11 − 2 = 9 — write 9.
  • Tens: after borrowing, 8; 8 − 7 = 1 — write 1.
  • Hundreds: 6 − 1 = 5 — write 5.

691 − 172 = 519

Second check: 691 − 519 = 172

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Recalculate with different values ↑

Column subtractions of 172

ExampleDifference
440 − 172268
463 − 172291
479 − 172307
497 − 172325
520 − 172348
526 − 172354
548 − 172376
561 − 172389
574 − 172402
599 − 172427
625 − 172453
640 − 172468
657 − 172485
691 − 172519
708 − 172536
736 − 172564
750 − 172578
774 − 172602
819 − 172647
855 − 172683

FAQ

What is 691 − 172?

691 − 172 = 519

How do you check that 691 − 172 = 519?

Add the difference and the subtrahend: 519 + 172 = 691. Getting the minuend back means the difference is right.

How many times do you borrow in 691 − 172?

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

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