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    Subtraction with Regrouping: 1,225 − 578

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 1,225 − 578?

    Answer

    1,225 − 578 =
    647

    With regrouping: 3 borrows — from the tens, the hundreds and the thousands

    1,225 − 578 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.
    01111+10
    1(was 1, now 0)2(was 2, now 11)2(was 2, now 11)5 (was 5, now 15)
    −578
    647

    Column by column: 1,225 − 578

    • Ones: 5 is less than 8 — borrow 1 ten: tens 2 → 1; 15 − 8 = 7 — write 7.
    • Tens: after borrowing, 1; 1 is less than 7 — borrow 1 hundred: hundreds 2 → 1; 11 − 7 = 4 — write 4.
    • Hundreds: after borrowing, 1; 1 is less than 5 — borrow 1 thousand: thousands 1 → 0; 11 − 5 = 6 — write 6.
    • Thousands: after borrowing, 0 — a leading zero is not written.

    1,225 − 578 = 647

    Second check: 1,225 − 647 = 578

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    1,225 − 578 = 647 - Subtraction with Regrouping. 1,225 − 578 = 647. Subtraction with regrouping step by step: 3 borrows, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/1225--578/generated.jpgCopy

    Column subtractions of 578

    ExampleDifference
    1,220 − 578642
    1,221 − 578643
    1,222 − 578644
    1,223 − 578645
    1,224 − 578646
    1,225 − 578647
    1,226 − 578648
    1,227 − 578649
    1,228 − 578650
    1,229 − 578651
    1,230 − 578652
    Recalculate with different values ↑

    FAQ

    What is 1,225 − 578?

    1,225 − 578 = 647

    How do you check that 1,225 − 578 = 647?

    Add the difference and the subtrahend: 647 + 578 = 1,225. Getting the minuend back means the difference is right.

    How many times do you borrow in 1,225 − 578?

    3 borrows: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

    See Also