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    Subtraction with Regrouping: 91 − 15

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 91 − 15?

    Answer

    91 − 15 =
    76

    With regrouping: 1 borrow — from the tens

    91 − 15 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.
    8+10
    9(was 9, now 8)1 (was 1, now 11)
    −15
    76

    Column by column: 91 − 15

    • Ones: 1 is less than 5 — borrow 1 ten: tens 9 → 8; 11 − 5 = 6 — write 6.
    • Tens: after borrowing, 8; 8 − 1 = 7 — write 7.

    91 − 15 = 76

    Second check: 91 − 76 = 15

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    https://calculat.io/en/number/long-subtraction/91--15Copy
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    91 − 15 = 76 - Subtraction with Regrouping. 91 − 15 = 76. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/91--15/generated.jpgCopy

    Column subtractions of 15

    ExampleDifference
    62 − 1547
    67 − 1552
    69 − 1554
    73 − 1558
    78 − 1563
    80 − 1565
    82 − 1567
    84 − 1569
    86 − 1571
    89 − 1574
    91 − 1576
    93 − 1578
    98 − 1583
    100 − 1585
    104 − 1589
    107 − 1592
    109 − 1594
    113 − 1598
    120 − 15105
    151 − 15136
    Recalculate with different values ↑

    FAQ

    What is 91 − 15?

    91 − 15 = 76

    How do you check that 91 − 15 = 76?

    Add the difference and the subtrahend: 76 + 15 = 91. Getting the minuend back means the difference is right.

    How many times do you borrow in 91 − 15?

    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