Addition with Regrouping: 602 + 128

Addition with Regrouping Calculator
First addend
Second addend

What is 602 + 128?

Answer

602 + 128 =
730

With regrouping: 1 carry — into the tens

602 + 128 in a column. Carries are the small circled digits above the columns.
1carry
6 0 2
+128
730

Column by column: 602 + 128

  • Ones: 2 + 8 = 10 — write 0, carry 1.
  • Tens: 0 + 2 + 1 = 3 — write 3.
  • Hundreds: 6 + 1 = 7 — write 7.

602 + 128 = 730

Second check: 730 − 602 = 128

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FAQ

What is 602 + 128?

602 + 128 = 730

How do you check that 602 + 128 = 730?

Subtract one addend from the sum: 730 − 128 = 602, and 730 − 602 = 128. Getting the other addend back means the sum is right.

How many carries are there in 602 + 128?

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 128 + 602 the same as 602 + 128?

Yes. Addition is commutative, so both give 730; the column looks the same with either number on top.

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