Addition with Regrouping: 647 + 89

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 89?

Answer

647 + 89 =
736

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

647 + 89 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 4 7
+89
736

Column by column: 647 + 89

  • Ones: 7 + 9 = 16 — write 6, carry 1.
  • Tens: 4 + 8 + 1 = 13 — write 3, carry 1.
  • Hundreds: 6 + 1 = 7 — write 7.

647 + 89 = 736

Second check: 736 − 647 = 89

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FAQ

What is 647 + 89?

647 + 89 = 736

How do you check that 647 + 89 = 736?

Subtract one addend from the sum: 736 − 89 = 647, and 736 − 647 = 89. Getting the other addend back means the sum is right.

How many carries are there in 647 + 89?

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 89 + 647 the same as 647 + 89?

Yes. Addition is commutative, so both give 736; the column looks the same with either number on top.