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    Subtraction with Regrouping: 84 − 39

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 84 − 39?

    Answer

    84 − 39 =
    45

    With regrouping: 1 borrow — from the tens

    84 − 39 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)4 (was 4, now 14)
    −39
    45

    Column by column: 84 − 39

    • Ones: 4 is less than 9 — borrow 1 ten: tens 8 → 7; 14 − 9 = 5 — write 5.
    • Tens: after borrowing, 7; 7 − 3 = 4 — write 4.

    84 − 39 = 45

    Second check: 84 − 45 = 39

    Similar examples to practise

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    https://calculat.io/en/number/long-subtraction/84--39Copy
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    84 − 39 = 45 - Subtraction with Regrouping. 84 − 39 = 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/84--39/generated.jpgCopy

    Column subtractions of 39

    ExampleDifference
    78 − 3939
    80 − 3941
    84 − 3945
    86 − 3947
    91 − 3952
    93 − 3954
    97 − 3958
    102 − 3963
    104 − 3965
    106 − 3967
    108 − 3969
    110 − 3971
    113 − 3974
    115 − 3976
    117 − 3978
    122 − 3983
    124 − 3985
    128 − 3989
    131 − 3992
    133 − 3994
    Recalculate with different values ↑

    FAQ

    What is 84 − 39?

    84 − 39 = 45

    How do you check that 84 − 39 = 45?

    Add the difference and the subtrahend: 45 + 39 = 84. Getting the minuend back means the difference is right.

    How many times do you borrow in 84 − 39?

    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