Subtraction with Regrouping: 921 − 402

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 921 − 402?

Answer

921 − 402 =
519

With regrouping: 1 borrow — from the tens

921 − 402 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.
1+10
9 2(was 2, now 1)1 (was 1, now 11)
−402
519

Column by column: 921 − 402

  • Ones: 1 is less than 2 — borrow 1 ten: tens 2 → 1; 11 − 2 = 9 — write 9.
  • Tens: after borrowing, 1; 1 − 0 = 1 — write 1.
  • Hundreds: 9 − 4 = 5 — write 5.

921 − 402 = 519

Second check: 921 − 519 = 402

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Recalculate with different values ↑

Column subtractions of 402

ExampleDifference
804 − 402402
829 − 402427
855 − 402453
870 − 402468
887 − 402485
900 − 402498
921 − 402519
938 − 402536
966 − 402564
980 − 402578
1,000 − 402598
1,004 − 402602
1,049 − 402647
1,085 − 402683
2,000 − 4021,598
5,000 − 4024,598
10,000 − 4029,598

FAQ

What is 921 − 402?

921 − 402 = 519

How do you check that 921 − 402 = 519?

Add the difference and the subtrahend: 519 + 402 = 921. Getting the minuend back means the difference is right.

How many times do you borrow in 921 − 402?

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