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    Column Addition: 71 + 28

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 71 + 28?

    Answer

    71 + 28 =
    99

    No regrouping: each column is added on its own

    71 + 28 in a column. No carries.
    7 1
    +28
    99

    Column by column: 71 + 28

    • Ones: 1 + 8 = 9 — write 9.
    • Tens: 7 + 2 = 9 — write 9.

    71 + 28 = 99

    Second check: 99 − 71 = 28

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    71 + 28 = 99 - Column Addition. 71 + 28 = 99. Column addition step by step: no carrying, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/71--28/generated.jpgCopy

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    Recalculate with different values ↑

    FAQ

    What is 71 + 28?

    71 + 28 = 99

    How do you check that 71 + 28 = 99?

    Subtract one addend from the sum: 99 − 28 = 71, and 99 − 71 = 28. Getting the other addend back means the sum is right.

    How many carries are there in 71 + 28?

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

    Is 28 + 71 the same as 71 + 28?

    Yes. Addition is commutative, so both give 99; the column looks the same with either number on top.

    See Also