Subtraction with Regrouping: 816 − 389

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 816 − 389?

Answer

816 − 389 =
427

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

816 − 389 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.
710+10
8(was 8, now 7)1(was 1, now 10)6 (was 6, now 16)
−389
427

Column by column: 816 − 389

  • Ones: 6 is less than 9 — borrow 1 ten: tens 1 → 0; 16 − 9 = 7 — write 7.
  • Tens: after borrowing, 0; 0 is less than 8 — borrow 1 hundred: hundreds 8 → 7; 10 − 8 = 2 — write 2.
  • Hundreds: after borrowing, 7; 7 − 3 = 4 — write 4.

816 − 389 = 427

Second check: 816 − 427 = 389

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Column subtractions of 389

ExampleDifference
811 − 389422
812 − 389423
813 − 389424
814 − 389425
815 − 389426
816 − 389427
817 − 389428
818 − 389429
819 − 389430
820 − 389431
821 − 389432

FAQ

What is 816 − 389?

816 − 389 = 427

How do you check that 816 − 389 = 427?

Add the difference and the subtrahend: 427 + 389 = 816. Getting the minuend back means the difference is right.

How many times do you borrow in 816 − 389?

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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