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    Subtraction with Regrouping: 122 − 17

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 122 − 17?

    Answer

    122 − 17 =
    105

    With regrouping: 1 borrow — from the tens

    122 − 17 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.
    1+10
    1 2(was 2, now 1)2 (was 2, now 12)
    −17
    105

    Column by column: 122 − 17

    • Ones: 2 is less than 7 — borrow 1 ten: tens 2 → 1; 12 − 7 = 5 — write 5.
    • Tens: after borrowing, 1; 1 − 1 = 0 — write 0.
    • Hundreds: nothing to subtract — write 1.

    122 − 17 = 105

    Second check: 122 − 105 = 17

    Similar examples to practise

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    122 − 17 = 105 - Subtraction with Regrouping. 122 − 17 = 105. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/122--17/generated.jpgCopy

    Column subtractions of 17

    ExampleDifference
    88 − 1771
    91 − 1774
    93 − 1776
    95 − 1778
    100 − 1783
    102 − 1785
    106 − 1789
    109 − 1792
    111 − 1794
    115 − 1798
    122 − 17105
    153 − 17136
    189 − 17172
    200 − 17183
    220 − 17203
    256 − 17239
    285 − 17268
    300 − 17283
    324 − 17307
    365 − 17348
    Recalculate with different values ↑

    FAQ

    What is 122 − 17?

    122 − 17 = 105

    How do you check that 122 − 17 = 105?

    Add the difference and the subtrahend: 105 + 17 = 122. Getting the minuend back means the difference is right.

    How many times do you borrow in 122 − 17?

    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