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    Addition with Regrouping: 578 + 427

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 578 + 427?

    Answer

    578 + 427 =
    1,005

    The sum is longer than the addends: 3 carries — into the tens, the hundreds and the thousands; the last one makes a new digit

    578 + 427 in a column. Carries are the small circled digits above the columns.
    1carry1carry1carry
    5 7 8
    +427
    1005

    Column by column: 578 + 427

    • Ones: 8 + 7 = 15 — write 5, carry 1.
    • Tens: 7 + 2 + 1 = 10 — write 0, carry 1.
    • Hundreds: 5 + 4 + 1 = 10 — write 0, carry 1.
    • Thousands: the carried 1 — write 1.

    578 + 427 = 1,005

    Second check: 1,005 − 578 = 427

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    578 + 427 = 1,005 - Addition with Regrouping. 578 + 427 = 1,005. Addition with regrouping step by step: 3 carries, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/578--427/generated.jpgCopy

    Column additions with 578

    ExampleSum
    578 + 256834
    578 + 268846
    578 + 291869
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    578 + 348926
    578 + 354932
    578 + 376954
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    578 + 4221,000
    578 + 4271,005
    578 + 4531,031
    578 + 4681,046
    578 + 4851,063
    578 + 5191,097
    578 + 5361,114
    578 + 5641,142
    578 + 5781,156
    Recalculate with different values ↑

    FAQ

    What is 578 + 427?

    578 + 427 = 1,005

    How do you check that 578 + 427 = 1,005?

    Subtract one addend from the sum: 1,005 − 427 = 578, and 1,005 − 578 = 427. Getting the other addend back means the sum is right.

    How many carries are there in 578 + 427?

    3 carries: 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 427 + 578 the same as 578 + 427?

    Yes. Addition is commutative, so both give 1,005; the column looks the same with either number on top.

    See Also