Subtraction with Regrouping: 870 − 187

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 870 − 187?

Answer

870 − 187 =
683

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

870 − 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.
716+10
8(was 8, now 7)7(was 7, now 16)0 (was 0, now 10)
−187
683

Column by column: 870 − 187

  • Ones: 0 is less than 7 — borrow 1 ten: tens 7 → 6; 10 − 7 = 3 — write 3.
  • Tens: after borrowing, 6; 6 is less than 8 — borrow 1 hundred: hundreds 8 → 7; 16 − 8 = 8 — write 8.
  • Hundreds: after borrowing, 7; 7 − 1 = 6 — write 6.

870 − 187 = 683

Second check: 870 − 683 = 187

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Column subtractions of 187

ExampleDifference
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
751 − 187564
765 − 187578
789 − 187602
834 − 187647
870 − 187683

FAQ

What is 870 − 187?

870 − 187 = 683

How do you check that 870 − 187 = 683?

Add the difference and the subtrahend: 683 + 187 = 870. Getting the minuend back means the difference is right.

How many times do you borrow in 870 − 187?

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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