Subtraction with Regrouping: 870 − 402

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 870 − 402?

Answer

870 − 402 =
468

With regrouping: 1 borrow — from the tens

870 − 402 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+10
8 7(was 7, now 6)0 (was 0, now 10)
−402
468

Column by column: 870 − 402

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

870 − 402 = 468

Second check: 870 − 468 = 402

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FAQ

What is 870 − 402?

870 − 402 = 468

How do you check that 870 − 402 = 468?

Add the difference and the subtrahend: 468 + 402 = 870. Getting the minuend back means the difference is right.

How many times do you borrow in 870 − 402?

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