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    Subtraction with Regrouping: 51 − 23

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 51 − 23?

    Answer

    51 − 23 =
    28

    With regrouping: 1 borrow — from the tens

    51 − 23 in a column. Above the columns: the values after borrowing — a crossed-out digit is replaced by the number above it; +10 marks a column that received a borrowed ten.
    4+10
    5(was 5, now 4)1 (was 1, now 11)
    −23
    28

    Column by column: 51 − 23

    • Ones: 1 is less than 3 — borrow 1 ten: tens 5 → 4; 11 − 3 = 8 — write 8.
    • Tens: after borrowing, 4; 4 − 2 = 2 — write 2.

    51 − 23 = 28

    Second check: 51 − 28 = 23

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    https://calculat.io/en/number/long-subtraction/51--23Copy
    <a href="https://calculat.io/en/number/long-subtraction/51--23">51 − 23 = 28 - Subtraction with Regrouping - Calculatio</a>Copy
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    51 − 23 = 28 - Subtraction with Regrouping. 51 − 23 = 28. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/51--23/generated.jpgCopy

    Column subtractions of 23

    ExampleDifference
    46 − 2323
    49 − 2326
    51 − 2328
    57 − 2334
    59 − 2336
    62 − 2339
    64 − 2341
    68 − 2345
    70 − 2347
    75 − 2352
    77 − 2354
    81 − 2358
    86 − 2363
    88 − 2365
    90 − 2367
    92 − 2369
    94 − 2371
    97 − 2374
    99 − 2376
    100 − 2377
    Recalculate with different values ↑

    FAQ

    What is 51 − 23?

    51 − 23 = 28

    How do you check that 51 − 23 = 28?

    Add the difference and the subtrahend: 28 + 23 = 51. Getting the minuend back means the difference is right.

    How many times do you borrow in 51 − 23?

    1 borrow: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

    See Also