Addition with Regrouping: 485 + 128

Addition with Regrouping Calculator
First addend
Second addend

What is 485 + 128?

Answer

485 + 128 =
613

With regrouping: 2 carries — into the tens and the hundreds

485 + 128 in a column. Carries are the small circled digits above the columns.
1carry1carry
4 8 5
+128
613

Column by column: 485 + 128

  • Ones: 5 + 8 = 13 — write 3, carry 1.
  • Tens: 8 + 2 + 1 = 11 — write 1, carry 1.
  • Hundreds: 4 + 1 + 1 = 6 — write 6.

485 + 128 = 613

Second check: 613 − 485 = 128

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FAQ

What is 485 + 128?

485 + 128 = 613

How do you check that 485 + 128 = 613?

Subtract one addend from the sum: 613 − 128 = 485, and 613 − 485 = 128. Getting the other addend back means the sum is right.

How many carries are there in 485 + 128?

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 128 + 485 the same as 485 + 128?

Yes. Addition is commutative, so both give 613; the column looks the same with either number on top.

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