Subtraction with Regrouping: 330 − 23

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 330 − 23?

Answer

330 − 23 =
307

With regrouping: 1 borrow — from the tens

330 − 23 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.
2+10
3 3(was 3, now 2)0 (was 0, now 10)
−23
307

Column by column: 330 − 23

  • Ones: 0 is less than 3 — borrow 1 ten: tens 3 → 2; 10 − 3 = 7 — write 7.
  • Tens: after borrowing, 2; 2 − 2 = 0 — write 0.
  • Hundreds: nothing to subtract — write 3.

330 − 23 = 307

Second check: 330 − 307 = 23

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See Also

FAQ

What is 330 − 23?

330 − 23 = 307

How do you check that 330 − 23 = 307?

Add the difference and the subtrahend: 307 + 23 = 330. Getting the minuend back means the difference is right.

How many times do you borrow in 330 − 23?

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