Addition with Regrouping: 485 + 23

Addition with Regrouping Calculator
First addend
Second addend

What is 485 + 23?

Answer

485 + 23 =
508

With regrouping: 1 carry — into the hundreds

485 + 23 in a column. Carries are the small circled digits above the columns.
1carry
4 8 5
+23
508

Column by column: 485 + 23

  • Ones: 5 + 3 = 8 — write 8.
  • Tens: 8 + 2 = 10 — write 0, carry 1.
  • Hundreds: 4 + 1 = 5 — write 5.

485 + 23 = 508

Second check: 508 − 485 = 23

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Recalculate with different values ↑

Column additions with 23

ExampleSum
177 + 23200
203 + 23226
239 + 23262
268 + 23291
277 + 23300
307 + 23330
348 + 23371
376 + 23399
402 + 23425
453 + 23476
485 + 23508
536 + 23559
578 + 23601
647 + 23670
677 + 23700
777 + 23800
877 + 23900
977 + 231,000
1,977 + 232,000
4,977 + 235,000

FAQ

What is 485 + 23?

485 + 23 = 508

How do you check that 485 + 23 = 508?

Subtract one addend from the sum: 508 − 23 = 485, and 508 − 485 = 23. Getting the other addend back means the sum is right.

How many carries are there in 485 + 23?

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 23 + 485 the same as 485 + 23?

Yes. Addition is commutative, so both give 508; the column looks the same with either number on top.

See Also