Subtraction with Regrouping: 1,036 − 389

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 1,036 − 389?

Answer

1,036 − 389 =
647

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

1,036 − 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.
0912+10
1(was 1, now 0)0(was 0, now 9)3(was 3, now 12)6 (was 6, now 16)
−389
647

Column by column: 1,036 − 389

  • Ones: 6 is less than 9 — borrow 1 ten: tens 3 → 2; 16 − 9 = 7 — write 7.
  • Tens: after borrowing, 2; 2 is less than 8 — borrow 1 thousand across the zero: thousands 1 → 0, hundreds 0 → 9; 12 − 8 = 4 — write 4.
  • Hundreds: after borrowing, 9; 9 − 3 = 6 — write 6.
  • Thousands: after borrowing, 0 — a leading zero is not written.

1,036 − 389 = 647

Second check: 1,036 − 647 = 389

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Recalculate with different values ↑

Column subtractions of 389

ExampleDifference
1,031 − 389642
1,032 − 389643
1,033 − 389644
1,034 − 389645
1,035 − 389646
1,036 − 389647
1,037 − 389648
1,038 − 389649
1,039 − 389650
1,040 − 389651
1,041 − 389652

FAQ

What is 1,036 − 389?

1,036 − 389 = 647

How do you check that 1,036 − 389 = 647?

Add the difference and the subtrahend: 647 + 389 = 1,036. Getting the minuend back means the difference is right.

How many times do you borrow in 1,036 − 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 1,036 − 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