Subtraction with Regrouping: 1,017 − 453

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 1,017 − 453?

Answer

1,017 − 453 =
564

With regrouping across a zero: 2 borrows — there are no hundreds to borrow from, so 1 thousand becomes 10 hundreds, and 1 hundred goes to the tens

1,017 − 453 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.
09+10
1(was 1, now 0)0(was 0, now 9)1 (was 1, now 11)7
−453
564

Column by column: 1,017 − 453

  • Ones: 7 − 3 = 4 — write 4.
  • Tens: 1 is less than 5 — borrow 1 thousand across the zero: thousands 1 → 0, hundreds 0 → 9; 11 − 5 = 6 — write 6.
  • Hundreds: after borrowing, 9; 9 − 4 = 5 — write 5.
  • Thousands: after borrowing, 0 — a leading zero is not written.

1,017 − 453 = 564

Second check: 1,017 − 564 = 453

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Recalculate with different values ↑

Column subtractions of 453

ExampleDifference
1,012 − 453559
1,013 − 453560
1,014 − 453561
1,015 − 453562
1,016 − 453563
1,017 − 453564
1,018 − 453565
1,019 − 453566
1,020 − 453567
1,021 − 453568
1,022 − 453569

FAQ

What is 1,017 − 453?

1,017 − 453 = 564

How do you check that 1,017 − 453 = 564?

Add the difference and the subtrahend: 564 + 453 = 1,017. Getting the minuend back means the difference is right.

How many times do you borrow in 1,017 − 453?

2 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 1,017 − 453?

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.

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