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    Subtraction with Regrouping: 1,004 − 485

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 1,004 − 485?

    Answer

    1,004 − 485 =
    519

    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

    1,004 − 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.
    099+10
    1(was 1, now 0)0(was 0, now 9)0(was 0, now 9)4 (was 4, now 14)
    −485
    519

    Column by column: 1,004 − 485

    • Ones: 4 is less than 5 — borrow 1 thousand across the zero: thousands 1 → 0, hundreds 0 → 9, tens 0 → 9; 14 − 5 = 9 — write 9.
    • Tens: after borrowing, 9; 9 − 8 = 1 — write 1.
    • Hundreds: after borrowing, 9; 9 − 4 = 5 — write 5.
    • Thousands: after borrowing, 0 — a leading zero is not written.

    1,004 − 485 = 519

    Second check: 1,004 − 519 = 485

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    1,004 − 485 = 519 - Subtraction with Regrouping. 1,004 − 485 = 519. Subtraction with regrouping step by step: 3 borrows across a zero, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/1004--485/generated.jpgCopy

    Column subtractions of 485

    ExampleDifference
    999 − 485514
    1,000 − 485515
    1,001 − 485516
    1,002 − 485517
    1,003 − 485518
    1,004 − 485519
    1,005 − 485520
    1,006 − 485521
    1,007 − 485522
    1,008 − 485523
    1,009 − 485524
    Recalculate with different values ↑

    FAQ

    What is 1,004 − 485?

    1,004 − 485 = 519

    How do you check that 1,004 − 485 = 519?

    Add the difference and the subtrahend: 519 + 485 = 1,004. Getting the minuend back means the difference is right.

    How many times do you borrow in 1,004 − 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 1,004 − 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.

    See Also