Subtraction with Regrouping: 302 − 63

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 302 − 63?

Answer

302 − 63 =
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

302 − 63 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)
−63
239

Column by column: 302 − 63

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

302 − 63 = 239

Second check: 302 − 239 = 63

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152 − 6389
155 − 6392
157 − 6394
161 − 6398
168 − 63105
199 − 63136
200 − 63137
235 − 63172
266 − 63203
300 − 63237
302 − 63239
331 − 63268
370 − 63307
411 − 63348
439 − 63376
465 − 63402
516 − 63453
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599 − 63536
641 − 63578

FAQ

What is 302 − 63?

302 − 63 = 239

How do you check that 302 − 63 = 239?

Add the difference and the subtrahend: 239 + 63 = 302. Getting the minuend back means the difference is right.

How many times do you borrow in 302 − 63?

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 − 63?

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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