Addition with Regrouping: 602 + 427

Addition with Regrouping Calculator
First addend
Second addend

What is 602 + 427?

Answer

602 + 427 =
1,029

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

602 + 427 in a column. Carries are the small circled digits above the columns.
1carry
6 0 2
+427
1029

Column by column: 602 + 427

  • Ones: 2 + 7 = 9 — write 9.
  • Tens: 0 + 2 = 2 — write 2.
  • Hundreds: 6 + 4 = 10 — write 0, carry 1.
  • Thousands: the carried 1 — write 1.

602 + 427 = 1,029

Second check: 1,029 − 602 = 427

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FAQ

What is 602 + 427?

602 + 427 = 1,029

How do you check that 602 + 427 = 1,029?

Subtract one addend from the sum: 1,029 − 427 = 602, and 1,029 − 602 = 427. Getting the other addend back means the sum is right.

How many carries are there in 602 + 427?

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 427 + 602 the same as 602 + 427?

Yes. Addition is commutative, so both give 1,029; the column looks the same with either number on top.

See Also