Subtraction with Regrouping: 5,000 − 485

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 5,000 − 485?

Answer

5,000 − 485 =
4,515

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

5,000 − 485 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.
499+10
5(was 5, now 4)0(was 0, now 9)0(was 0, now 9)0 (was 0, now 10)
−485
4515

Column by column: 5,000 − 485

  • Ones: 0 is less than 5 — borrow 1 thousand across the zero: thousands 5 → 4, hundreds 0 → 9, tens 0 → 9; 10 − 5 = 5 — write 5.
  • Tens: after borrowing, 9; 9 − 8 = 1 — write 1.
  • Hundreds: after borrowing, 9; 9 − 4 = 5 — write 5.
  • Thousands: after borrowing, 4; nothing to subtract — write 4.

5,000 − 485 = 4,515

Second check: 5,000 − 4,515 = 485

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FAQ

What is 5,000 − 485?

5,000 − 485 = 4,515

How do you check that 5,000 − 485 = 4,515?

Add the difference and the subtrahend: 4,515 + 485 = 5,000. Getting the minuend back means the difference is right.

How many times do you borrow in 5,000 − 485?

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 5,000 − 485?

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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