Addition with Regrouping: 602 + 578

Addition with Regrouping Calculator
First addend
Second addend

What is 602 + 578?

Answer

602 + 578 =
1,180

The sum is longer than the addends: 2 carries — into the tens and the thousands; the last one makes a new digit

602 + 578 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 0 2
+578
1180

Column by column: 602 + 578

  • Ones: 2 + 8 = 10 — write 0, carry 1.
  • Tens: 0 + 7 + 1 = 8 — write 8.
  • Hundreds: 6 + 5 = 11 — write 1, carry 1.
  • Thousands: the carried 1 — write 1.

602 + 578 = 1,180

Second check: 1,180 − 602 = 578

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FAQ

What is 602 + 578?

602 + 578 = 1,180

How do you check that 602 + 578 = 1,180?

Subtract one addend from the sum: 1,180 − 578 = 602, and 1,180 − 602 = 578. Getting the other addend back means the sum is right.

How many carries are there in 602 + 578?

2 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 578 + 602 the same as 602 + 578?

Yes. Addition is commutative, so both give 1,180; the column looks the same with either number on top.

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