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    Subtraction with Regrouping: 81 − 36

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 81 − 36?

    Answer

    81 − 36 =
    45

    With regrouping: 1 borrow — from the tens

    81 − 36 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.
    7+10
    8(was 8, now 7)1 (was 1, now 11)
    −36
    45

    Column by column: 81 − 36

    • Ones: 1 is less than 6 — borrow 1 ten: tens 8 → 7; 11 − 6 = 5 — write 5.
    • Tens: after borrowing, 7; 7 − 3 = 4 — write 4.

    81 − 36 = 45

    Second check: 81 − 45 = 36

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    81 − 36 = 45 - Subtraction with Regrouping. 81 − 36 = 45. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/81--36/generated.jpgCopy

    Column subtractions of 36

    ExampleDifference
    72 − 3636
    75 − 3639
    77 − 3641
    81 − 3645
    83 − 3647
    88 − 3652
    90 − 3654
    94 − 3658
    99 − 3663
    100 − 3664
    101 − 3665
    103 − 3667
    105 − 3669
    107 − 3671
    110 − 3674
    112 − 3676
    114 − 3678
    119 − 3683
    121 − 3685
    125 − 3689
    Recalculate with different values ↑

    FAQ

    What is 81 − 36?

    81 − 36 = 45

    How do you check that 81 − 36 = 45?

    Add the difference and the subtrahend: 45 + 36 = 81. Getting the minuend back means the difference is right.

    How many times do you borrow in 81 − 36?

    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