Addition with Regrouping: 172 + 54

Addition with Regrouping Calculator
First addend
Second addend

What is 172 + 54?

Answer

172 + 54 =
226

With regrouping: 1 carry — into the hundreds

172 + 54 in a column. Carries are the small circled digits above the columns.
1carry
1 7 2
+54
226

Column by column: 172 + 54

  • Ones: 2 + 4 = 6 — write 6.
  • Tens: 7 + 5 = 12 — write 2, carry 1.
  • Hundreds: 1 + 1 = 2 — write 2.

172 + 54 = 226

Second check: 226 − 172 = 54

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FAQ

What is 172 + 54?

172 + 54 = 226

How do you check that 172 + 54 = 226?

Subtract one addend from the sum: 226 − 54 = 172, and 226 − 172 = 54. Getting the other addend back means the sum is right.

How many carries are there in 172 + 54?

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 54 + 172 the same as 172 + 54?

Yes. Addition is commutative, so both give 226; the column looks the same with either number on top.