Addition with Regrouping: 647 + 65

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 65?

Answer

647 + 65 =
712

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

647 + 65 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 4 7
+65
712

Column by column: 647 + 65

  • Ones: 7 + 5 = 12 — write 2, carry 1.
  • Tens: 4 + 6 + 1 = 11 — write 1, carry 1.
  • Hundreds: 6 + 1 = 7 — write 7.

647 + 65 = 712

Second check: 712 − 647 = 65

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FAQ

What is 647 + 65?

647 + 65 = 712

How do you check that 647 + 65 = 712?

Subtract one addend from the sum: 712 − 65 = 647, and 712 − 647 = 65. Getting the other addend back means the sum is right.

How many carries are there in 647 + 65?

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 65 + 647 the same as 647 + 65?

Yes. Addition is commutative, so both give 712; the column looks the same with either number on top.