Addition with Regrouping: 67 + 23

Addition with Regrouping Calculator
First addend
Second addend

What is 67 + 23?

Answer

67 + 23 =
90

With regrouping: 1 carry — into the tens

67 + 23 in a column. Carries are the small circled digits above the columns.
1carry
6 7
+23
90

Column by column: 67 + 23

  • Ones: 7 + 3 = 10 — write 0, carry 1.
  • Tens: 6 + 2 + 1 = 9 — write 9.

67 + 23 = 90

Second check: 90 − 67 = 23

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FAQ

What is 67 + 23?

67 + 23 = 90

How do you check that 67 + 23 = 90?

Subtract one addend from the sum: 90 − 23 = 67, and 90 − 67 = 23. Getting the other addend back means the sum is right.

How many carries are there in 67 + 23?

1 carry: every time a column added up to 10 or more, its ones digit was written and 1 was carried to the next column on the left.

Is 23 + 67 the same as 67 + 23?

Yes. Addition is commutative, so both give 90; the column looks the same with either number on top.