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    Addition with Regrouping: 12,345 + 8,042

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 12,345 + 8,042?

    Answer

    12,345 + 8,042 =
    20,387

    With regrouping: 1 carry — into the ten thousands

    12,345 + 8,042 in a column. Carries are the small circled digits above the columns.
    1carry
    1 2 3 4 5
    +8042
    20387

    Column by column: 12,345 + 8,042

    • Ones: 5 + 2 = 7 — write 7.
    • Tens: 4 + 4 = 8 — write 8.
    • Hundreds: 3 + 0 = 3 — write 3.
    • Thousands: 2 + 8 = 10 — write 0, carry 1.
    • Ten thousands: 1 + 1 = 2 — write 2.

    12,345 + 8,042 = 20,387

    Second check: 20,387 − 12,345 = 8,042

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    https://calculat.io/en/number/long-addition/12345--8042Copy
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    12,345 + 8,042 = 20,387 - Addition with Regrouping. 12,345 + 8,042 = 20,387. Addition with regrouping step by step: 1 carry, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/12345--8042/generated.jpgCopy

    Column additions with 8,042

    ExampleSum
    12,340 + 8,04220,382
    12,341 + 8,04220,383
    12,342 + 8,04220,384
    12,343 + 8,04220,385
    12,344 + 8,04220,386
    12,345 + 8,04220,387
    12,346 + 8,04220,388
    12,347 + 8,04220,389
    12,348 + 8,04220,390
    12,349 + 8,04220,391
    12,350 + 8,04220,392
    Recalculate with different values ↑

    FAQ

    What is 12,345 + 8,042?

    12,345 + 8,042 = 20,387

    How do you check that 12,345 + 8,042 = 20,387?

    Subtract one addend from the sum: 20,387 − 8,042 = 12,345, and 20,387 − 12,345 = 8,042. Getting the other addend back means the sum is right.

    How many carries are there in 12,345 + 8,042?

    1 carry: 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 8,042 + 12,345 the same as 12,345 + 8,042?

    Yes. Addition is commutative, so both give 20,387; the column looks the same with either number on top.

    See Also