Subtraction with Regrouping: 661 − 83

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 661 − 83?

Answer

661 − 83 =
578

With regrouping: 2 borrows — from the tens and the hundreds

661 − 83 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.
515+10
6(was 6, now 5)6(was 6, now 15)1 (was 1, now 11)
−83
578

Column by column: 661 − 83

  • Ones: 1 is less than 3 — borrow 1 ten: tens 6 → 5; 11 − 3 = 8 — write 8.
  • Tens: after borrowing, 5; 5 is less than 8 — borrow 1 hundred: hundreds 6 → 5; 15 − 8 = 7 — write 7.
  • Hundreds: after borrowing, 5; nothing to subtract — write 5.

661 − 83 = 578

Second check: 661 − 578 = 83

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Column subtractions of 83

ExampleDifference
351 − 83268
390 − 83307
400 − 83317
431 − 83348
459 − 83376
485 − 83402
500 − 83417
536 − 83453
568 − 83485
600 − 83517
619 − 83536
661 − 83578
700 − 83617
730 − 83647
800 − 83717
900 − 83817
1,000 − 83917
2,000 − 831,917
5,000 − 834,917
10,000 − 839,917

FAQ

What is 661 − 83?

661 − 83 = 578

How do you check that 661 − 83 = 578?

Add the difference and the subtrahend: 578 + 83 = 661. Getting the minuend back means the difference is right.

How many times do you borrow in 661 − 83?

2 borrows: 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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