Subtraction with Regrouping: 308 − 69

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 308 − 69?

Answer

308 − 69 =
239

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

308 − 69 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)8 (was 8, now 18)
−69
239

Column by column: 308 − 69

  • Ones: 8 is less than 9 — borrow 1 hundred across the zero: hundreds 3 → 2, tens 0 → 9; 18 − 9 = 9 — write 9.
  • Tens: after borrowing, 9; 9 − 6 = 3 — write 3.
  • Hundreds: after borrowing, 2; nothing to subtract — write 2.

308 − 69 = 239

Second check: 308 − 239 = 69

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Column subtractions of 69

ExampleDifference
152 − 6983
154 − 6985
158 − 6989
161 − 6992
163 − 6994
167 − 6998
174 − 69105
205 − 69136
241 − 69172
272 − 69203
308 − 69239
337 − 69268
376 − 69307
417 − 69348
445 − 69376
471 − 69402
522 − 69453
554 − 69485
605 − 69536
647 − 69578

FAQ

What is 308 − 69?

308 − 69 = 239

How do you check that 308 − 69 = 239?

Add the difference and the subtrahend: 239 + 69 = 308. Getting the minuend back means the difference is right.

How many times do you borrow in 308 − 69?

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 308 − 69?

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.

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