Subtraction with Regrouping: 1,072 − 389

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 1,072 − 389?

Answer

1,072 − 389 =
683

With regrouping across a zero: 3 borrows — there are no hundreds to borrow from, so 1 thousand becomes 10 hundreds, and 1 hundred goes to the tens

1,072 − 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.
0916+10
1(was 1, now 0)0(was 0, now 9)7(was 7, now 16)2 (was 2, now 12)
−389
683

Column by column: 1,072 − 389

  • Ones: 2 is less than 9 — borrow 1 ten: tens 7 → 6; 12 − 9 = 3 — write 3.
  • Tens: after borrowing, 6; 6 is less than 8 — borrow 1 thousand across the zero: thousands 1 → 0, hundreds 0 → 9; 16 − 8 = 8 — write 8.
  • Hundreds: after borrowing, 9; 9 − 3 = 6 — write 6.
  • Thousands: after borrowing, 0 — a leading zero is not written.

1,072 − 389 = 683

Second check: 1,072 − 683 = 389

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Recalculate with different values ↑

Column subtractions of 389

ExampleDifference
1,067 − 389678
1,068 − 389679
1,069 − 389680
1,070 − 389681
1,071 − 389682
1,072 − 389683
1,073 − 389684
1,074 − 389685
1,075 − 389686
1,076 − 389687
1,077 − 389688

FAQ

What is 1,072 − 389?

1,072 − 389 = 683

How do you check that 1,072 − 389 = 683?

Add the difference and the subtrahend: 683 + 389 = 1,072. Getting the minuend back means the difference is right.

How many times do you borrow in 1,072 − 389?

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

Why does 0 become 9 when borrowing in 1,072 − 389?

The zero has nothing to lend, so it first borrows 1 from its left neighbour and becomes 10; then it lends 1 to the column on its right and keeps 9.

See Also