Feedback form
Hi! What do you think?

Drag it here or paste with Ctrl+V

    You can also email us on infocalculat.io

    Subtraction with Regrouping: 100 − 12

    Subtraction with Regrouping Calculator
    Minuend
    Subtrahend

    What is 100 − 12?

    Answer

    100 − 12 =
    88

    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

    100 − 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.
    09+10
    1(was 1, now 0)0(was 0, now 9)0 (was 0, now 10)
    −12
    88

    Column by column: 100 − 12

    • Ones: 0 is less than 2 — borrow 1 hundred across the zero: hundreds 1 → 0, tens 0 → 9; 10 − 2 = 8 — write 8.
    • Tens: after borrowing, 9; 9 − 1 = 8 — write 8.
    • Hundreds: after borrowing, 0 — a leading zero is not written.

    100 − 12 = 88

    Second check: 100 − 88 = 12

    Similar examples to practise

    Related Calculations

    See Also

    Share This Calculation
    Print
    https://calculat.io/en/number/long-subtraction/100--12Copy
    <a href="https://calculat.io/en/number/long-subtraction/100--12">100 − 12 = 88 - Subtraction with Regrouping - Calculatio</a>Copy
    Facebook
    Twitter
    Telegram
    WhatsApp
    Viber
    Email
    100 − 12 = 88 - Subtraction with Regrouping. 100 − 12 = 88. 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/100--12/generated.jpgCopy

    Column subtractions of 12

    ExampleDifference
    75 − 1263
    77 − 1265
    79 − 1267
    81 − 1269
    83 − 1271
    86 − 1274
    88 − 1276
    90 − 1278
    95 − 1283
    97 − 1285
    100 − 1288
    101 − 1289
    104 − 1292
    106 − 1294
    110 − 1298
    117 − 12105
    148 − 12136
    184 − 12172
    200 − 12188
    215 − 12203
    Recalculate with different values ↑

    FAQ

    What is 100 − 12?

    100 − 12 = 88

    How do you check that 100 − 12 = 88?

    Add the difference and the subtrahend: 88 + 12 = 100. Getting the minuend back means the difference is right.

    How many times do you borrow in 100 − 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 100 − 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