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    Addition with Regrouping: 12,345 + 3,579

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 12,345 + 3,579?

    Answer

    12,345 + 3,579 =
    15,924

    With regrouping: 2 carries — into the tens and the hundreds

    12,345 + 3,579 in a column. Carries are the small circled digits above the columns.
    1carry1carry
    1 2 3 4 5
    +3579
    15924

    Column by column: 12,345 + 3,579

    • Ones: 5 + 9 = 14 — write 4, carry 1.
    • Tens: 4 + 7 + 1 = 12 — write 2, carry 1.
    • Hundreds: 3 + 5 + 1 = 9 — write 9.
    • Thousands: 2 + 3 = 5 — write 5.
    • Ten thousands: nothing to add — write 1.

    12,345 + 3,579 = 15,924

    Second check: 15,924 − 12,345 = 3,579

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    https://calculat.io/en/number/long-addition/12345--3579Copy
    <a href="https://calculat.io/en/number/long-addition/12345--3579">12,345 + 3,579 = 15,924 - Addition with Regrouping</a>Copy
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    12,345 + 3,579 = 15,924 - Addition with Regrouping. 12,345 + 3,579 = 15,924. Addition with regrouping step by step: 2 carries, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/12345--3579/generated.jpgCopy

    Column additions with 3,579

    ExampleSum
    12,340 + 3,57915,919
    12,341 + 3,57915,920
    12,342 + 3,57915,921
    12,343 + 3,57915,922
    12,344 + 3,57915,923
    12,345 + 3,57915,924
    12,346 + 3,57915,925
    12,347 + 3,57915,926
    12,348 + 3,57915,927
    12,349 + 3,57915,928
    12,350 + 3,57915,929
    Recalculate with different values ↑

    FAQ

    What is 12,345 + 3,579?

    12,345 + 3,579 = 15,924

    How do you check that 12,345 + 3,579 = 15,924?

    Subtract one addend from the sum: 15,924 − 3,579 = 12,345, and 15,924 − 12,345 = 3,579. Getting the other addend back means the sum is right.

    How many carries are there in 12,345 + 3,579?

    2 carries: every time a column added up to 10 or more, its ones digit was written and 1 was carried to the next column on the left.

    Is 3,579 + 12,345 the same as 12,345 + 3,579?

    Yes. Addition is commutative, so both give 15,924; the column looks the same with either number on top.

    See Also