Addition with Regrouping: 427 + 307

Addition with Regrouping Calculator
First addend
Second addend

What is 427 + 307?

Answer

427 + 307 =
734

With regrouping: 1 carry — into the tens

427 + 307 in a column. Carries are the small circled digits above the columns.
1carry
4 2 7
+307
734

Column by column: 427 + 307

  • Ones: 7 + 7 = 14 — write 4, carry 1.
  • Tens: 2 + 0 + 1 = 3 — write 3.
  • Hundreds: 4 + 3 = 7 — write 7.

427 + 307 = 734

Second check: 734 − 427 = 307

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FAQ

What is 427 + 307?

427 + 307 = 734

How do you check that 427 + 307 = 734?

Subtract one addend from the sum: 734 − 307 = 427, and 734 − 427 = 307. Getting the other addend back means the sum is right.

How many carries are there in 427 + 307?

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 307 + 427 the same as 427 + 307?

Yes. Addition is commutative, so both give 734; the column looks the same with either number on top.