Addition with Regrouping: 277 + 23

Addition with Regrouping Calculator
First addend
Second addend

What is 277 + 23?

Answer

277 + 23 =
300

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

277 + 23 in a column. Carries are the small circled digits above the columns.
1carry1carry
2 7 7
+23
300

Column by column: 277 + 23

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

277 + 23 = 300

Second check: 300 − 277 = 23

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FAQ

What is 277 + 23?

277 + 23 = 300

How do you check that 277 + 23 = 300?

Subtract one addend from the sum: 300 − 23 = 277, and 300 − 277 = 23. Getting the other addend back means the sum is right.

How many carries are there in 277 + 23?

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 23 + 277 the same as 277 + 23?

Yes. Addition is commutative, so both give 300; the column looks the same with either number on top.

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