Subtraction with Regrouping: 912 − 427

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 912 − 427?

Answer

912 − 427 =
485

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

912 − 427 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.
810+10
9(was 9, now 8)1(was 1, now 10)2 (was 2, now 12)
−427
485

Column by column: 912 − 427

  • Ones: 2 is less than 7 — borrow 1 ten: tens 1 → 0; 12 − 7 = 5 — write 5.
  • Tens: after borrowing, 0; 0 is less than 2 — borrow 1 hundred: hundreds 9 → 8; 10 − 2 = 8 — write 8.
  • Hundreds: after borrowing, 8; 8 − 4 = 4 — write 4.

912 − 427 = 485

Second check: 912 − 485 = 427

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Column subtractions of 427

ExampleDifference
907 − 427480
908 − 427481
909 − 427482
910 − 427483
911 − 427484
912 − 427485
913 − 427486
914 − 427487
915 − 427488
916 − 427489
917 − 427490

FAQ

What is 912 − 427?

912 − 427 = 485

How do you check that 912 − 427 = 485?

Add the difference and the subtrahend: 485 + 427 = 912. Getting the minuend back means the difference is right.

How many times do you borrow in 912 − 427?

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

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