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    Subtraction with Regrouping: 307 − 39

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 307 − 39?

    Answer

    307 − 39 =
    268

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

    307 − 39 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.
    29+10
    3(was 3, now 2)0(was 0, now 9)7 (was 7, now 17)
    −39
    268

    Column by column: 307 − 39

    • Ones: 7 is less than 9 — borrow 1 hundred across the zero: hundreds 3 → 2, tens 0 → 9; 17 − 9 = 8 — write 8.
    • Tens: after borrowing, 9; 9 − 3 = 6 — write 6.
    • Hundreds: after borrowing, 2; nothing to subtract — write 2.

    307 − 39 = 268

    Second check: 307 − 268 = 39

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    https://calculat.io/en/number/long-subtraction/307--39Copy
    <a href="https://calculat.io/en/number/long-subtraction/307--39">307 − 39 = 268 - Subtraction with Regrouping - Calculatio</a>Copy
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    307 − 39 = 268 - Subtraction with Regrouping. 307 − 39 = 268. Subtraction with regrouping step by step: 2 borrows across a zero, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/307--39/generated.jpgCopy

    Column subtractions of 39

    ExampleDifference
    124 − 3985
    128 − 3989
    131 − 3992
    133 − 3994
    137 − 3998
    144 − 39105
    175 − 39136
    211 − 39172
    242 − 39203
    278 − 39239
    307 − 39268
    346 − 39307
    387 − 39348
    400 − 39361
    415 − 39376
    441 − 39402
    492 − 39453
    500 − 39461
    524 − 39485
    575 − 39536
    Recalculate with different values ↑

    FAQ

    What is 307 − 39?

    307 − 39 = 268

    How do you check that 307 − 39 = 268?

    Add the difference and the subtrahend: 268 + 39 = 307. Getting the minuend back means the difference is right.

    How many times do you borrow in 307 − 39?

    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 307 − 39?

    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