Subtraction with Regrouping: 302 − 34

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 302 − 34?

Answer

302 − 34 =
268

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

302 − 34 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)2 (was 2, now 12)
−34
268

Column by column: 302 − 34

  • Ones: 2 is less than 4 — borrow 1 hundred across the zero: hundreds 3 → 2, tens 0 → 9; 12 − 4 = 8 — write 8.
  • Tens: after borrowing, 9; 9 − 3 = 6 — write 6.
  • Hundreds: after borrowing, 2; nothing to subtract — write 2.

302 − 34 = 268

Second check: 302 − 268 = 34

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Column subtractions of 34

ExampleDifference
119 − 3485
123 − 3489
126 − 3492
128 − 3494
132 − 3498
139 − 34105
170 − 34136
206 − 34172
237 − 34203
273 − 34239
302 − 34268
341 − 34307
382 − 34348
410 − 34376
436 − 34402
487 − 34453
519 − 34485
570 − 34536
612 − 34578
681 − 34647

FAQ

What is 302 − 34?

302 − 34 = 268

How do you check that 302 − 34 = 268?

Add the difference and the subtrahend: 268 + 34 = 302. Getting the minuend back means the difference is right.

How many times do you borrow in 302 − 34?

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 302 − 34?

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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