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    Column Addition: 172 + 15

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 172 + 15?

    Answer

    172 + 15 =
    187

    No regrouping: each column is added on its own

    172 + 15 in a column. No carries.
    1 7 2
    +15
    187

    Column by column: 172 + 15

    • Ones: 2 + 5 = 7 — write 7.
    • Tens: 7 + 1 = 8 — write 8.
    • Hundreds: nothing to add — write 1.

    172 + 15 = 187

    Second check: 187 − 172 = 15

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    <a href="https://calculat.io/en/number/long-addition/172--15">172 + 15 = 187 - Column Addition - Calculatio</a>Copy
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    172 + 15 = 187 - Column Addition. 172 + 15 = 187. Column addition step by step: no carrying, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/172--15/generated.jpgCopy

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    Recalculate with different values ↑

    FAQ

    What is 172 + 15?

    172 + 15 = 187

    How do you check that 172 + 15 = 187?

    Subtract one addend from the sum: 187 − 15 = 172, and 187 − 172 = 15. Getting the other addend back means the sum is right.

    How many carries are there in 172 + 15?

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

    Is 15 + 172 the same as 172 + 15?

    Yes. Addition is commutative, so both give 187; the column looks the same with either number on top.

    See Also