Addition with Regrouping: 70,312 + 3,579

Addition with Regrouping Calculator
First addend
Second addend

What is 70,312 + 3,579?

Answer

70,312 + 3,579 =
73,891

With regrouping: 1 carry — into the tens

70,312 + 3,579 in a column. Carries are the small circled digits above the columns.
1carry
7 0 3 1 2
+3579
73891

Column by column: 70,312 + 3,579

  • Ones: 2 + 9 = 11 — write 1, carry 1.
  • Tens: 1 + 7 + 1 = 9 — write 9.
  • Hundreds: 3 + 5 = 8 — write 8.
  • Thousands: 0 + 3 = 3 — write 3.
  • Ten thousands: nothing to add — write 7.

70,312 + 3,579 = 73,891

Second check: 73,891 − 70,312 = 3,579

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ExampleSum
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70,311 + 3,57973,890
70,312 + 3,57973,891
70,313 + 3,57973,892
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FAQ

What is 70,312 + 3,579?

70,312 + 3,579 = 73,891

How do you check that 70,312 + 3,579 = 73,891?

Subtract one addend from the sum: 73,891 − 3,579 = 70,312, and 73,891 − 70,312 = 3,579. Getting the other addend back means the sum is right.

How many carries are there in 70,312 + 3,579?

1 carry: 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 + 70,312 the same as 70,312 + 3,579?

Yes. Addition is commutative, so both give 73,891; the column looks the same with either number on top.

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