Subtraction with Regrouping: 513 − 28

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 513 − 28?

Answer

513 − 28 =
485

With regrouping: 2 borrows — from the tens and the hundreds

513 − 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.
410+10
5(was 5, now 4)1(was 1, now 10)3 (was 3, now 13)
−28
485

Column by column: 513 − 28

  • Ones: 3 is less than 8 — borrow 1 ten: tens 1 → 0; 13 − 8 = 5 — write 5.
  • Tens: after borrowing, 0; 0 is less than 2 — borrow 1 hundred: hundreds 5 → 4; 10 − 2 = 8 — write 8.
  • Hundreds: after borrowing, 4; nothing to subtract — write 4.

513 − 28 = 485

Second check: 513 − 485 = 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 513 − 28?

513 − 28 = 485

How do you check that 513 − 28 = 485?

Add the difference and the subtrahend: 485 + 28 = 513. Getting the minuend back means the difference is right.

How many times do you borrow in 513 − 28?

2 borrows: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also