Addition with Regrouping: 307 + 89

Addition with Regrouping Calculator
First addend
Second addend

What is 307 + 89?

Answer

307 + 89 =
396

With regrouping: 1 carry — into the tens

307 + 89 in a column. Carries are the small circled digits above the columns.
1carry
3 0 7
+89
396

Column by column: 307 + 89

  • Ones: 7 + 9 = 16 — write 6, carry 1.
  • Tens: 0 + 8 + 1 = 9 — write 9.
  • Hundreds: nothing to add — write 3.

307 + 89 = 396

Second check: 396 − 307 = 89

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FAQ

What is 307 + 89?

307 + 89 = 396

How do you check that 307 + 89 = 396?

Subtract one addend from the sum: 396 − 89 = 307, and 396 − 307 = 89. Getting the other addend back means the sum is right.

How many carries are there in 307 + 89?

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 89 + 307 the same as 307 + 89?

Yes. Addition is commutative, so both give 396; the column looks the same with either number on top.