Subtraction with Regrouping: 421 − 19

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 421 − 19?

Answer

421 − 19 =
402

With regrouping: 1 borrow — from the tens

421 − 19 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
4 2(was 2, now 1)1 (was 1, now 11)
−19
402

Column by column: 421 − 19

  • Ones: 1 is less than 9 — borrow 1 ten: tens 2 → 1; 11 − 9 = 2 — write 2.
  • Tens: after borrowing, 1; 1 − 1 = 0 — write 0.
  • Hundreds: nothing to subtract — write 4.

421 − 19 = 402

Second check: 421 − 402 = 19

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Column subtractions of 19

ExampleDifference
113 − 1994
117 − 1998
124 − 19105
155 − 19136
191 − 19172
222 − 19203
258 − 19239
287 − 19268
326 − 19307
367 − 19348
395 − 19376
400 − 19381
421 − 19402
472 − 19453
500 − 19481
504 − 19485
555 − 19536
597 − 19578
600 − 19581
666 − 19647

FAQ

What is 421 − 19?

421 − 19 = 402

How do you check that 421 − 19 = 402?

Add the difference and the subtrahend: 402 + 19 = 421. Getting the minuend back means the difference is right.

How many times do you borrow in 421 − 19?

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