Addition with Regrouping: 485 + 427

Addition with Regrouping Calculator
First addend
Second addend

What is 485 + 427?

Answer

485 + 427 =
912

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

485 + 427 in a column. Carries are the small circled digits above the columns.
1carry1carry
4 8 5
+427
912

Column by column: 485 + 427

  • Ones: 5 + 7 = 12 — write 2, carry 1.
  • Tens: 8 + 2 + 1 = 11 — write 1, carry 1.
  • Hundreds: 4 + 4 + 1 = 9 — write 9.

485 + 427 = 912

Second check: 912 − 485 = 427

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FAQ

What is 485 + 427?

485 + 427 = 912

How do you check that 485 + 427 = 912?

Subtract one addend from the sum: 912 − 427 = 485, and 912 − 485 = 427. Getting the other addend back means the sum is right.

How many carries are there in 485 + 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 + 485 the same as 485 + 427?

Yes. Addition is commutative, so both give 912; the column looks the same with either number on top.

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