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    Column Addition: 63 + 15

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 63 + 15?

    Answer

    63 + 15 =
    78

    No regrouping: each column is added on its own

    63 + 15 in a column. No carries.
    6 3
    +15
    78

    Column by column: 63 + 15

    • Ones: 3 + 5 = 8 — write 8.
    • Tens: 6 + 1 = 7 — write 7.

    63 + 15 = 78

    Second check: 78 − 63 = 15

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    <a href="https://calculat.io/en/number/long-addition/63--15">63 + 15 = 78 - Column Addition - Calculatio</a>Copy
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    63 + 15 = 78 - Column Addition. 63 + 15 = 78. Column addition step by step: no carrying, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/63--15/generated.jpgCopy

    Column additions with 15

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    Recalculate with different values ↑

    FAQ

    What is 63 + 15?

    63 + 15 = 78

    How do you check that 63 + 15 = 78?

    Subtract one addend from the sum: 78 − 15 = 63, and 78 − 63 = 15. Getting the other addend back means the sum is right.

    How many carries are there in 63 + 15?

    None: no column adds up to 10 or more, so every digit of the sum is written straight away.

    Is 15 + 63 the same as 63 + 15?

    Yes. Addition is commutative, so both give 78; the column looks the same with either number on top.

    See Also