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    Addition with Regrouping: 28 + 12

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 28 + 12?

    Answer

    28 + 12 =
    40

    With regrouping: 1 carry — into the tens

    28 + 12 in a column. Carries are the small circled digits above the columns.
    1carry
    2 8
    +12
    40

    Column by column: 28 + 12

    • Ones: 8 + 2 = 10 — write 0, carry 1.
    • Tens: 2 + 1 + 1 = 4 — write 4.

    28 + 12 = 40

    Second check: 40 − 28 = 12

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    https://calculat.io/en/number/long-addition/28--12Copy
    <a href="https://calculat.io/en/number/long-addition/28--12">28 + 12 = 40 - Addition with Regrouping - Calculatio</a>Copy
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    28 + 12 = 40 - Addition with Regrouping. 28 + 12 = 40. 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--12/generated.jpgCopy

    Column additions with 12

    ExampleSum
    12 + 1224
    15 + 1227
    17 + 1229
    19 + 1231
    23 + 1235
    26 + 1238
    28 + 1240
    34 + 1246
    36 + 1248
    39 + 1251
    41 + 1253
    45 + 1257
    47 + 1259
    52 + 1264
    54 + 1266
    58 + 1270
    63 + 1275
    65 + 1277
    67 + 1279
    69 + 1281
    Recalculate with different values ↑

    FAQ

    What is 28 + 12?

    28 + 12 = 40

    How do you check that 28 + 12 = 40?

    Subtract one addend from the sum: 40 − 12 = 28, and 40 − 28 = 12. Getting the other addend back means the sum is right.

    How many carries are there in 28 + 12?

    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 12 + 28 the same as 28 + 12?

    Yes. Addition is commutative, so both give 40; the column looks the same with either number on top.

    See Also