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    Subtraction with Regrouping: 1,000 − 422

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 1,000 − 422?

    Answer

    1,000 − 422 =
    578

    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

    1,000 − 422 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)0 (was 0, now 10)
    −422
    578

    Column by column: 1,000 − 422

    • Ones: 0 is less than 2 — borrow 1 thousand across the zero: thousands 1 → 0, hundreds 0 → 9, tens 0 → 9; 10 − 2 = 8 — write 8.
    • Tens: after borrowing, 9; 9 − 2 = 7 — write 7.
    • Hundreds: after borrowing, 9; 9 − 4 = 5 — write 5.
    • Thousands: after borrowing, 0 — a leading zero is not written.

    1,000 − 422 = 578

    Second check: 1,000 − 578 = 422

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    1,000 − 422 = 578 - Subtraction with Regrouping. 1,000 − 422 = 578. 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/1000--422/generated.jpgCopy

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    Recalculate with different values ↑

    FAQ

    What is 1,000 − 422?

    1,000 − 422 = 578

    How do you check that 1,000 − 422 = 578?

    Add the difference and the subtrahend: 578 + 422 = 1,000. Getting the minuend back means the difference is right.

    How many times do you borrow in 1,000 − 422?

    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 1,000 − 422?

    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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