Addition with Regrouping: 602 + 389

Addition with Regrouping Calculator
First addend
Second addend

What is 602 + 389?

Answer

602 + 389 =
991

With regrouping: 1 carry — into the tens

602 + 389 in a column. Carries are the small circled digits above the columns.
1carry
6 0 2
+389
991

Column by column: 602 + 389

  • Ones: 2 + 9 = 11 — write 1, carry 1.
  • Tens: 0 + 8 + 1 = 9 — write 9.
  • Hundreds: 6 + 3 = 9 — write 9.

602 + 389 = 991

Second check: 991 − 602 = 389

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FAQ

What is 602 + 389?

602 + 389 = 991

How do you check that 602 + 389 = 991?

Subtract one addend from the sum: 991 − 389 = 602, and 991 − 602 = 389. Getting the other addend back means the sum is right.

How many carries are there in 602 + 389?

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 389 + 602 the same as 602 + 389?

Yes. Addition is commutative, so both give 991; the column looks the same with either number on top.

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