Addition with Regrouping: 172 + 67

Addition with Regrouping Calculator
First addend
Second addend

What is 172 + 67?

Answer

172 + 67 =
239

With regrouping: 1 carry — into the hundreds

172 + 67 in a column. Carries are the small circled digits above the columns.
1carry
1 7 2
+67
239

Column by column: 172 + 67

  • Ones: 2 + 7 = 9 — write 9.
  • Tens: 7 + 6 = 13 — write 3, carry 1.
  • Hundreds: 1 + 1 = 2 — write 2.

172 + 67 = 239

Second check: 239 − 172 = 67

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FAQ

What is 172 + 67?

172 + 67 = 239

How do you check that 172 + 67 = 239?

Subtract one addend from the sum: 239 − 67 = 172, and 239 − 172 = 67. Getting the other addend back means the sum is right.

How many carries are there in 172 + 67?

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 67 + 172 the same as 172 + 67?

Yes. Addition is commutative, so both give 239; the column looks the same with either number on top.