Addition with Regrouping: 427 + 291

Addition with Regrouping Calculator
First addend
Second addend

What is 427 + 291?

Answer

427 + 291 =
718

With regrouping: 1 carry — into the hundreds

427 + 291 in a column. Carries are the small circled digits above the columns.
1carry
4 2 7
+291
718

Column by column: 427 + 291

  • Ones: 7 + 1 = 8 — write 8.
  • Tens: 2 + 9 = 11 — write 1, carry 1.
  • Hundreds: 4 + 2 + 1 = 7 — write 7.

427 + 291 = 718

Second check: 718 − 427 = 291

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FAQ

What is 427 + 291?

427 + 291 = 718

How do you check that 427 + 291 = 718?

Subtract one addend from the sum: 718 − 291 = 427, and 718 − 427 = 291. Getting the other addend back means the sum is right.

How many carries are there in 427 + 291?

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 291 + 427 the same as 427 + 291?

Yes. Addition is commutative, so both give 718; the column looks the same with either number on top.