Addition with Regrouping: 647 + 203

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 203?

Answer

647 + 203 =
850

With regrouping: 1 carry — into the tens

647 + 203 in a column. Carries are the small circled digits above the columns.
1carry
6 4 7
+203
850

Column by column: 647 + 203

  • Ones: 7 + 3 = 10 — write 0, carry 1.
  • Tens: 4 + 0 + 1 = 5 — write 5.
  • Hundreds: 6 + 2 = 8 — write 8.

647 + 203 = 850

Second check: 850 − 647 = 203

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FAQ

What is 647 + 203?

647 + 203 = 850

How do you check that 647 + 203 = 850?

Subtract one addend from the sum: 850 − 203 = 647, and 850 − 647 = 203. Getting the other addend back means the sum is right.

How many carries are there in 647 + 203?

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 203 + 647 the same as 647 + 203?

Yes. Addition is commutative, so both give 850; the column looks the same with either number on top.

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