Subtraction with Regrouping: 778 − 389

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 778 − 389?

Answer

778 − 389 =
389

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

778 − 389 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.
616+10
7(was 7, now 6)7(was 7, now 16)8 (was 8, now 18)
−389
389

Column by column: 778 − 389

  • Ones: 8 is less than 9 — borrow 1 ten: tens 7 → 6; 18 − 9 = 9 — write 9.
  • Tens: after borrowing, 6; 6 is less than 8 — borrow 1 hundred: hundreds 7 → 6; 16 − 8 = 8 — write 8.
  • Hundreds: after borrowing, 6; 6 − 3 = 3 — write 3.

778 − 389 = 389

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Column subtractions of 389

ExampleDifference
773 − 389384
774 − 389385
775 − 389386
776 − 389387
777 − 389388
778 − 389389
779 − 389390
780 − 389391
781 − 389392
782 − 389393
783 − 389394

FAQ

What is 778 − 389?

778 − 389 = 389

How do you check that 778 − 389 = 389?

Add the difference and the subtrahend: 389 + 389 = 778. Getting the minuend back means the difference is right.

How many times do you borrow in 778 − 389?

2 borrows: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also