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    Addition with Regrouping: 12,345 + 4,805

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 12,345 + 4,805?

    Answer

    12,345 + 4,805 =
    17,150

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

    12,345 + 4,805 in a column. Carries are the small circled digits above the columns.
    1carry1carry
    1 2 3 4 5
    +4805
    17150

    Column by column: 12,345 + 4,805

    • Ones: 5 + 5 = 10 — write 0, carry 1.
    • Tens: 4 + 0 + 1 = 5 — write 5.
    • Hundreds: 3 + 8 = 11 — write 1, carry 1.
    • Thousands: 2 + 4 + 1 = 7 — write 7.
    • Ten thousands: nothing to add — write 1.

    12,345 + 4,805 = 17,150

    Second check: 17,150 − 12,345 = 4,805

    Similar examples to practise

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    https://calculat.io/en/number/long-addition/12345--4805Copy
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    12,345 + 4,805 = 17,150 - Addition with Regrouping. 12,345 + 4,805 = 17,150. 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--4805/generated.jpgCopy

    Column additions with 4,805

    ExampleSum
    12,340 + 4,80517,145
    12,341 + 4,80517,146
    12,342 + 4,80517,147
    12,343 + 4,80517,148
    12,344 + 4,80517,149
    12,345 + 4,80517,150
    12,346 + 4,80517,151
    12,347 + 4,80517,152
    12,348 + 4,80517,153
    12,349 + 4,80517,154
    12,350 + 4,80517,155
    Recalculate with different values ↑

    FAQ

    What is 12,345 + 4,805?

    12,345 + 4,805 = 17,150

    How do you check that 12,345 + 4,805 = 17,150?

    Subtract one addend from the sum: 17,150 − 4,805 = 12,345, and 17,150 − 12,345 = 4,805. Getting the other addend back means the sum is right.

    How many carries are there in 12,345 + 4,805?

    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 4,805 + 12,345 the same as 12,345 + 4,805?

    Yes. Addition is commutative, so both give 17,150; the column looks the same with either number on top.

    See Also