Addition with Regrouping: 647 + 427

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 427?

Answer

647 + 427 =
1,074

The sum is longer than the addends: 2 carries — into the tens and the thousands; the last one makes a new digit

647 + 427 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 4 7
+427
1074

Column by column: 647 + 427

  • Ones: 7 + 7 = 14 — write 4, carry 1.
  • Tens: 4 + 2 + 1 = 7 — write 7.
  • Hundreds: 6 + 4 = 10 — write 0, carry 1.
  • Thousands: the carried 1 — write 1.

647 + 427 = 1,074

Second check: 1,074 − 647 = 427

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FAQ

What is 647 + 427?

647 + 427 = 1,074

How do you check that 647 + 427 = 1,074?

Subtract one addend from the sum: 1,074 − 427 = 647, and 1,074 − 647 = 427. Getting the other addend back means the sum is right.

How many carries are there in 647 + 427?

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 427 + 647 the same as 647 + 427?

Yes. Addition is commutative, so both give 1,074; the column looks the same with either number on top.

See Also