Addition with Regrouping: 647 + 389

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First addend
Second addend

What is 647 + 389?

Answer

647 + 389 =
1,036

The sum is longer than the addends: 3 carries — into the tens, the hundreds and the thousands; the last one makes a new digit

647 + 389 in a column. Carries are the small circled digits above the columns.
1carry1carry1carry
6 4 7
+389
1036

Column by column: 647 + 389

  • Ones: 7 + 9 = 16 — write 6, carry 1.
  • Tens: 4 + 8 + 1 = 13 — write 3, carry 1.
  • Hundreds: 6 + 3 + 1 = 10 — write 0, carry 1.
  • Thousands: the carried 1 — write 1.

647 + 389 = 1,036

Second check: 1,036 − 647 = 389

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FAQ

What is 647 + 389?

647 + 389 = 1,036

How do you check that 647 + 389 = 1,036?

Subtract one addend from the sum: 1,036 − 389 = 647, and 1,036 − 647 = 389. Getting the other addend back means the sum is right.

How many carries are there in 647 + 389?

3 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 389 + 647 the same as 647 + 389?

Yes. Addition is commutative, so both give 1,036; the column looks the same with either number on top.

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