Subtraction with Regrouping: 390 − 187

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 390 − 187?

Answer

390 − 187 =
203

With regrouping: 1 borrow — from the tens

390 − 187 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.
8+10
3 9(was 9, now 8)0 (was 0, now 10)
−187
203

Column by column: 390 − 187

  • Ones: 0 is less than 7 — borrow 1 ten: tens 9 → 8; 10 − 7 = 3 — write 3.
  • Tens: after borrowing, 8; 8 − 8 = 0 — write 0.
  • Hundreds: 3 − 1 = 2 — write 2.

390 − 187 = 203

Second check: 390 − 203 = 187

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Column subtractions of 187

ExampleDifference
374 − 187187
390 − 187203
401 − 187214
426 − 187239
443 − 187256
455 − 187268
478 − 187291
494 − 187307
512 − 187325
535 − 187348
541 − 187354
563 − 187376
576 − 187389
589 − 187402
614 − 187427
640 − 187453
655 − 187468
672 − 187485
706 − 187519
723 − 187536

FAQ

What is 390 − 187?

390 − 187 = 203

How do you check that 390 − 187 = 203?

Add the difference and the subtrahend: 203 + 187 = 390. Getting the minuend back means the difference is right.

How many times do you borrow in 390 − 187?

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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