Addition with Regrouping: 397 + 203

Addition with Regrouping Calculator
First addend
Second addend

What is 397 + 203?

Answer

397 + 203 =
600

With regrouping: 2 carries — into the tens and the hundreds

397 + 203 in a column. Carries are the small circled digits above the columns.
1carry1carry
3 9 7
+203
600

Column by column: 397 + 203

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

397 + 203 = 600

Second check: 600 − 397 = 203

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FAQ

What is 397 + 203?

397 + 203 = 600

How do you check that 397 + 203 = 600?

Subtract one addend from the sum: 600 − 203 = 397, and 600 − 397 = 203. Getting the other addend back means the sum is right.

How many carries are there in 397 + 203?

2 carries: 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 203 + 397 the same as 397 + 203?

Yes. Addition is commutative, so both give 600; the column looks the same with either number on top.

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