Subtraction with Regrouping: 668 − 149

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 668 − 149?

Answer

668 − 149 =
519

With regrouping: 1 borrow — from the tens

668 − 149 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.
5+10
6 6(was 6, now 5)8 (was 8, now 18)
−149
519

Column by column: 668 − 149

  • Ones: 8 is less than 9 — borrow 1 ten: tens 6 → 5; 18 − 9 = 9 — write 9.
  • Tens: after borrowing, 5; 5 − 4 = 1 — write 1.
  • Hundreds: 6 − 1 = 5 — write 5.

668 − 149 = 519

Second check: 668 − 519 = 149

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Column subtractions of 149

ExampleDifference
456 − 149307
474 − 149325
497 − 149348
500 − 149351
503 − 149354
525 − 149376
538 − 149389
551 − 149402
576 − 149427
600 − 149451
602 − 149453
617 − 149468
634 − 149485
668 − 149519
685 − 149536
713 − 149564
727 − 149578
751 − 149602
796 − 149647
832 − 149683

FAQ

What is 668 − 149?

668 − 149 = 519

How do you check that 668 − 149 = 519?

Add the difference and the subtrahend: 519 + 149 = 668. Getting the minuend back means the difference is right.

How many times do you borrow in 668 − 149?

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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