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    Addition with Regrouping: 172 + 78

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 172 + 78?

    Answer

    172 + 78 =
    250

    With regrouping: 2 carries — into the tens and the hundreds

    172 + 78 in a column. Carries are the small circled digits above the columns.
    1carry1carry
    1 7 2
    +78
    250

    Column by column: 172 + 78

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

    172 + 78 = 250

    Second check: 250 − 172 = 78

    Similar examples to practise

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    172 + 78 = 250 - Addition with Regrouping. 172 + 78 = 250. Addition with regrouping step by step: 2 carries, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/172--78/generated.jpgCopy

    Column additions with 78

    ExampleSum
    78 + 78156
    83 + 78161
    85 + 78163
    89 + 78167
    92 + 78170
    94 + 78172
    98 + 78176
    105 + 78183
    136 + 78214
    172 + 78250
    203 + 78281
    239 + 78317
    268 + 78346
    307 + 78385
    348 + 78426
    376 + 78454
    402 + 78480
    453 + 78531
    485 + 78563
    536 + 78614
    Recalculate with different values ↑

    FAQ

    What is 172 + 78?

    172 + 78 = 250

    How do you check that 172 + 78 = 250?

    Subtract one addend from the sum: 250 − 78 = 172, and 250 − 172 = 78. Getting the other addend back means the sum is right.

    How many carries are there in 172 + 78?

    2 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 78 + 172 the same as 172 + 78?

    Yes. Addition is commutative, so both give 250; the column looks the same with either number on top.

    See Also