Column Subtraction: 29 − 12

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 29 − 12?

Answer

29 − 12 =
17

No regrouping: each column is subtracted on its own

29 − 12 in a column. No borrowing.
2 9
−12
17

Column by column: 29 − 12

  • Ones: 9 − 2 = 7 — write 7.
  • Tens: 2 − 1 = 1 — write 1.

29 − 12 = 17

Second check: 29 − 17 = 12

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FAQ

What is 29 − 12?

29 − 12 = 17

How do you check that 29 − 12 = 17?

Add the difference and the subtrahend: 17 + 12 = 29. Getting the minuend back means the difference is right.

How many times do you borrow in 29 − 12?

Not once: every top digit is at least as large as the digit below it.