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    Addition with Regrouping: 28 + 17

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 28 + 17?

    Answer

    28 + 17 =
    45

    With regrouping: 1 carry — into the tens

    28 + 17 in a column. Carries are the small circled digits above the columns.
    1carry
    2 8
    +17
    45

    Column by column: 28 + 17

    • Ones: 8 + 7 = 15 — write 5, carry 1.
    • Tens: 2 + 1 + 1 = 4 — write 4.

    28 + 17 = 45

    Second check: 45 − 28 = 17

    Similar examples to practise

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    https://calculat.io/en/number/long-addition/28--17Copy
    <a href="https://calculat.io/en/number/long-addition/28--17">28 + 17 = 45 - Addition with Regrouping - Calculatio</a>Copy
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    28 + 17 = 45 - Addition with Regrouping. 28 + 17 = 45. Addition with regrouping step by step: 1 carry, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/28--17/generated.jpgCopy

    Column additions with 17

    ExampleSum
    17 + 1734
    19 + 1736
    23 + 1740
    26 + 1743
    28 + 1745
    34 + 1751
    36 + 1753
    39 + 1756
    41 + 1758
    45 + 1762
    47 + 1764
    52 + 1769
    54 + 1771
    58 + 1775
    63 + 1780
    65 + 1782
    67 + 1784
    69 + 1786
    71 + 1788
    74 + 1791
    Recalculate with different values ↑

    FAQ

    What is 28 + 17?

    28 + 17 = 45

    How do you check that 28 + 17 = 45?

    Subtract one addend from the sum: 45 − 17 = 28, and 45 − 28 = 17. Getting the other addend back means the sum is right.

    How many carries are there in 28 + 17?

    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 17 + 28 the same as 28 + 17?

    Yes. Addition is commutative, so both give 45; the column looks the same with either number on top.

    See Also