Addition with Regrouping: 683 + 172

Addition with Regrouping Calculator
First addend
Second addend

What is 683 + 172?

Answer

683 + 172 =
855

With regrouping: 1 carry — into the hundreds

683 + 172 in a column. Carries are the small circled digits above the columns.
1carry
6 8 3
+172
855

Column by column: 683 + 172

  • Ones: 3 + 2 = 5 — write 5.
  • Tens: 8 + 7 = 15 — write 5, carry 1.
  • Hundreds: 6 + 1 + 1 = 8 — write 8.

683 + 172 = 855

Second check: 855 − 683 = 172

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FAQ

What is 683 + 172?

683 + 172 = 855

How do you check that 683 + 172 = 855?

Subtract one addend from the sum: 855 − 172 = 683, and 855 − 683 = 172. Getting the other addend back means the sum is right.

How many carries are there in 683 + 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 + 683 the same as 683 + 172?

Yes. Addition is commutative, so both give 855; the column looks the same with either number on top.