Addition with Regrouping: 239 + 71

Addition with Regrouping Calculator
First addend
Second addend

What is 239 + 71?

Answer

239 + 71 =
310

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

239 + 71 in a column. Carries are the small circled digits above the columns.
1carry1carry
2 3 9
+71
310

Column by column: 239 + 71

  • Ones: 9 + 1 = 10 — write 0, carry 1.
  • Tens: 3 + 7 + 1 = 11 — write 1, carry 1.
  • Hundreds: 2 + 1 = 3 — write 3.

239 + 71 = 310

Second check: 310 − 239 = 71

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FAQ

What is 239 + 71?

239 + 71 = 310

How do you check that 239 + 71 = 310?

Subtract one addend from the sum: 310 − 71 = 239, and 310 − 239 = 71. Getting the other addend back means the sum is right.

How many carries are there in 239 + 71?

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 71 + 239 the same as 239 + 71?

Yes. Addition is commutative, so both give 310; the column looks the same with either number on top.

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