Addition with Regrouping: 453 + 172

Addition with Regrouping Calculator
First addend
Second addend

What is 453 + 172?

Answer

453 + 172 =
625

With regrouping: 1 carry — into the hundreds

453 + 172 in a column. Carries are the small circled digits above the columns.
1carry
4 5 3
+172
625

Column by column: 453 + 172

  • Ones: 3 + 2 = 5 — write 5.
  • Tens: 5 + 7 = 12 — write 2, carry 1.
  • Hundreds: 4 + 1 + 1 = 6 — write 6.

453 + 172 = 625

Second check: 625 − 453 = 172

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FAQ

What is 453 + 172?

453 + 172 = 625

How do you check that 453 + 172 = 625?

Subtract one addend from the sum: 625 − 172 = 453, and 625 − 453 = 172. Getting the other addend back means the sum is right.

How many carries are there in 453 + 172?

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 172 + 453 the same as 453 + 172?

Yes. Addition is commutative, so both give 625; the column looks the same with either number on top.