Subtraction with Regrouping: 17,150 − 4,805

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 17,150 − 4,805?

Answer

17,150 − 4,805 =
12,345

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

17,150 − 4,805 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.
6+104+10
1 7(was 7, now 6)1 (was 1, now 11)5(was 5, now 4)0 (was 0, now 10)
−4805
12345

Column by column: 17,150 − 4,805

  • Ones: 0 is less than 5 — borrow 1 ten: tens 5 → 4; 10 − 5 = 5 — write 5.
  • Tens: after borrowing, 4; 4 − 0 = 4 — write 4.
  • Hundreds: 1 is less than 8 — borrow 1 thousand: thousands 7 → 6; 11 − 8 = 3 — write 3.
  • Thousands: after borrowing, 6; 6 − 4 = 2 — write 2.
  • Ten thousands: nothing to subtract — write 1.

17,150 − 4,805 = 12,345

Second check: 17,150 − 12,345 = 4,805

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Column subtractions of 4,805

ExampleDifference
17,145 − 4,80512,340
17,146 − 4,80512,341
17,147 − 4,80512,342
17,148 − 4,80512,343
17,149 − 4,80512,344
17,150 − 4,80512,345
17,151 − 4,80512,346
17,152 − 4,80512,347
17,153 − 4,80512,348
17,154 − 4,80512,349
17,155 − 4,80512,350

FAQ

What is 17,150 − 4,805?

17,150 − 4,805 = 12,345

How do you check that 17,150 − 4,805 = 12,345?

Add the difference and the subtrahend: 12,345 + 4,805 = 17,150. Getting the minuend back means the difference is right.

How many times do you borrow in 17,150 − 4,805?

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