Addition with Regrouping: 405,067 + 3,579

Addition with Regrouping Calculator
First addend
Second addend

What is 405,067 + 3,579?

Answer

405,067 + 3,579 =
408,646

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

405,067 + 3,579 in a column. Carries are the small circled digits above the columns.
1carry1carry
4 0 5 0 6 7
+3579
408646

Column by column: 405,067 + 3,579

  • Ones: 7 + 9 = 16 — write 6, carry 1.
  • Tens: 6 + 7 + 1 = 14 — write 4, carry 1.
  • Hundreds: 0 + 5 + 1 = 6 — write 6.
  • Thousands: 5 + 3 = 8 — write 8.
  • Ten thousands: nothing to add — write 0.
  • Hundred thousands: nothing to add — write 4.

405,067 + 3,579 = 408,646

Second check: 408,646 − 405,067 = 3,579

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405,062 + 3,579408,641
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405,067 + 3,579408,646
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FAQ

What is 405,067 + 3,579?

405,067 + 3,579 = 408,646

How do you check that 405,067 + 3,579 = 408,646?

Subtract one addend from the sum: 408,646 − 3,579 = 405,067, and 408,646 − 405,067 = 3,579. Getting the other addend back means the sum is right.

How many carries are there in 405,067 + 3,579?

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 3,579 + 405,067 the same as 405,067 + 3,579?

Yes. Addition is commutative, so both give 408,646; the column looks the same with either number on top.

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