Addition with Regrouping: 485 + 39

Addition with Regrouping Calculator
First addend
Second addend

What is 485 + 39?

Answer

485 + 39 =
524

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

485 + 39 in a column. Carries are the small circled digits above the columns.
1carry1carry
4 8 5
+39
524

Column by column: 485 + 39

  • Ones: 5 + 9 = 14 — write 4, carry 1.
  • Tens: 8 + 3 + 1 = 12 — write 2, carry 1.
  • Hundreds: 4 + 1 = 5 — write 5.

485 + 39 = 524

Second check: 524 − 485 = 39

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FAQ

What is 485 + 39?

485 + 39 = 524

How do you check that 485 + 39 = 524?

Subtract one addend from the sum: 524 − 39 = 485, and 524 − 485 = 39. Getting the other addend back means the sum is right.

How many carries are there in 485 + 39?

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 39 + 485 the same as 485 + 39?

Yes. Addition is commutative, so both give 524; the column looks the same with either number on top.

See Also