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    Subtraction with Regrouping: 300 − 12

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 300 − 12?

    Answer

    300 − 12 =
    288

    With regrouping across a zero: 2 borrows — there are no tens to borrow from, so 1 hundred becomes 10 tens, and 1 ten goes to the ones

    300 − 12 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.
    29+10
    3(was 3, now 2)0(was 0, now 9)0 (was 0, now 10)
    −12
    288

    Column by column: 300 − 12

    • Ones: 0 is less than 2 — borrow 1 hundred across the zero: hundreds 3 → 2, tens 0 → 9; 10 − 2 = 8 — write 8.
    • Tens: after borrowing, 9; 9 − 1 = 8 — write 8.
    • Hundreds: after borrowing, 2; nothing to subtract — write 2.

    300 − 12 = 288

    Second check: 300 − 288 = 12

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    https://calculat.io/en/number/long-subtraction/300--12Copy
    <a href="https://calculat.io/en/number/long-subtraction/300--12">300 − 12 = 288 - Subtraction with Regrouping - Calculatio</a>Copy
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    300 − 12 = 288 - Subtraction with Regrouping. 300 − 12 = 288. Subtraction with regrouping step by step: 2 borrows across a zero, every digit of the difference and an addition check.
    https://calculat.io/en/number/long-subtraction/300--12/generated.jpgCopy

    Column subtractions of 12

    ExampleDifference
    104 − 1292
    106 − 1294
    110 − 1298
    117 − 12105
    148 − 12136
    184 − 12172
    200 − 12188
    215 − 12203
    251 − 12239
    280 − 12268
    300 − 12288
    319 − 12307
    360 − 12348
    388 − 12376
    400 − 12388
    414 − 12402
    465 − 12453
    497 − 12485
    500 − 12488
    548 − 12536
    Recalculate with different values ↑

    FAQ

    What is 300 − 12?

    300 − 12 = 288

    How do you check that 300 − 12 = 288?

    Add the difference and the subtrahend: 288 + 12 = 300. Getting the minuend back means the difference is right.

    How many times do you borrow in 300 − 12?

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

    Why does 0 become 9 when borrowing in 300 − 12?

    The zero has nothing to lend, so it first borrows 1 from its left neighbour and becomes 10; then it lends 1 to the column on its right and keeps 9.

    See Also