Subtraction with Regrouping: 430 − 28

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 430 − 28?

Answer

430 − 28 =
402

With regrouping: 1 borrow — from the tens

430 − 28 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
4 3(was 3, now 2)0 (was 0, now 10)
−28
402

Column by column: 430 − 28

  • Ones: 0 is less than 8 — borrow 1 ten: tens 3 → 2; 10 − 8 = 2 — write 2.
  • Tens: after borrowing, 2; 2 − 2 = 0 — write 0.
  • Hundreds: nothing to subtract — write 4.

430 − 28 = 402

Second check: 430 − 402 = 28

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See Also

FAQ

What is 430 − 28?

430 − 28 = 402

How do you check that 430 − 28 = 402?

Add the difference and the subtrahend: 402 + 28 = 430. Getting the minuend back means the difference is right.

How many times do you borrow in 430 − 28?

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