Addition with Regrouping: 647 + 602

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 602?

Answer

647 + 602 =
1,249

The sum is longer than the addends: 1 carry — into the thousands; the last one makes a new digit

647 + 602 in a column. Carries are the small circled digits above the columns.
1carry
6 4 7
+602
1249

Column by column: 647 + 602

  • Ones: 7 + 2 = 9 — write 9.
  • Tens: 4 + 0 = 4 — write 4.
  • Hundreds: 6 + 6 = 12 — write 2, carry 1.
  • Thousands: the carried 1 — write 1.

647 + 602 = 1,249

Second check: 1,249 − 647 = 602

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FAQ

What is 647 + 602?

647 + 602 = 1,249

How do you check that 647 + 602 = 1,249?

Subtract one addend from the sum: 1,249 − 602 = 647, and 1,249 − 647 = 602. Getting the other addend back means the sum is right.

How many carries are there in 647 + 602?

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 602 + 647 the same as 647 + 602?

Yes. Addition is commutative, so both give 1,249; the column looks the same with either number on top.

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