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    Addition with Regrouping: 172 + 128

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 172 + 128?

    Answer

    172 + 128 =
    300

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

    172 + 128 in a column. Carries are the small circled digits above the columns.
    1carry1carry
    1 7 2
    +128
    300

    Column by column: 172 + 128

    • Ones: 2 + 8 = 10 — write 0, carry 1.
    • Tens: 7 + 2 + 1 = 10 — write 0, carry 1.
    • Hundreds: 1 + 1 + 1 = 3 — write 3.

    172 + 128 = 300

    Second check: 300 − 172 = 128

    Similar examples to practise

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    172 + 128 = 300 - Addition with Regrouping. 172 + 128 = 300. 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--128/generated.jpgCopy

    Column additions with 128

    ExampleSum
    128 + 128256
    136 + 128264
    149 + 128277
    172 + 128300
    187 + 128315
    203 + 128331
    214 + 128342
    239 + 128367
    256 + 128384
    268 + 128396
    291 + 128419
    307 + 128435
    325 + 128453
    348 + 128476
    354 + 128482
    376 + 128504
    389 + 128517
    402 + 128530
    427 + 128555
    453 + 128581
    Recalculate with different values ↑

    FAQ

    What is 172 + 128?

    172 + 128 = 300

    How do you check that 172 + 128 = 300?

    Subtract one addend from the sum: 300 − 128 = 172, and 300 − 172 = 128. Getting the other addend back means the sum is right.

    How many carries are there in 172 + 128?

    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 128 + 172 the same as 172 + 128?

    Yes. Addition is commutative, so both give 300; the column looks the same with either number on top.

    See Also