Subtraction with Regrouping: 500 − 28

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 500 − 28?

Answer

500 − 28 =
472

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

500 − 28 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.
49+10
5(was 5, now 4)0(was 0, now 9)0 (was 0, now 10)
−28
472

Column by column: 500 − 28

  • Ones: 0 is less than 8 — borrow 1 hundred across the zero: hundreds 5 → 4, tens 0 → 9; 10 − 8 = 2 — write 2.
  • Tens: after borrowing, 9; 9 − 2 = 7 — write 7.
  • Hundreds: after borrowing, 4; nothing to subtract — write 4.

500 − 28 = 472

Second check: 500 − 472 = 28

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Column subtractions of 28

ExampleDifference
126 − 2898
133 − 28105
164 − 28136
200 − 28172
231 − 28203
267 − 28239
296 − 28268
300 − 28272
335 − 28307
376 − 28348
400 − 28372
404 − 28376
430 − 28402
481 − 28453
500 − 28472
513 − 28485
564 − 28536
600 − 28572
606 − 28578
675 − 28647

FAQ

What is 500 − 28?

500 − 28 = 472

How do you check that 500 − 28 = 472?

Add the difference and the subtrahend: 472 + 28 = 500. Getting the minuend back means the difference is right.

How many times do you borrow in 500 − 28?

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 500 − 28?

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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