Subtraction with Regrouping: 670 − 23

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 670 − 23?

Answer

670 − 23 =
647

With regrouping: 1 borrow — from the tens

670 − 23 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.
6+10
6 7(was 7, now 6)0 (was 0, now 10)
−23
647

Column by column: 670 − 23

  • Ones: 0 is less than 3 — borrow 1 ten: tens 7 → 6; 10 − 3 = 7 — write 7.
  • Tens: after borrowing, 6; 6 − 2 = 4 — write 4.
  • Hundreds: nothing to subtract — write 6.

670 − 23 = 647

Second check: 670 − 647 = 23

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Recalculate with different values ↑

Column subtractions of 23

ExampleDifference
226 − 23203
262 − 23239
291 − 23268
300 − 23277
330 − 23307
371 − 23348
399 − 23376
425 − 23402
476 − 23453
508 − 23485
559 − 23536
601 − 23578
670 − 23647
700 − 23677
800 − 23777
900 − 23877
1,000 − 23977
2,000 − 231,977
5,000 − 234,977
10,000 − 239,977

FAQ

What is 670 − 23?

670 − 23 = 647

How do you check that 670 − 23 = 647?

Add the difference and the subtrahend: 647 + 23 = 670. Getting the minuend back means the difference is right.

How many times do you borrow in 670 − 23?

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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