Addition with Regrouping: 578 + 402

Addition with Regrouping Calculator
First addend
Second addend

What is 578 + 402?

Answer

578 + 402 =
980

With regrouping: 1 carry — into the tens

578 + 402 in a column. Carries are the small circled digits above the columns.
1carry
5 7 8
+402
980

Column by column: 578 + 402

  • Ones: 8 + 2 = 10 — write 0, carry 1.
  • Tens: 7 + 0 + 1 = 8 — write 8.
  • Hundreds: 5 + 4 = 9 — write 9.

578 + 402 = 980

Second check: 980 − 578 = 402

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Recalculate with different values ↑

Column additions with 402

ExampleSum
402 + 402804
427 + 402829
453 + 402855
468 + 402870
485 + 402887
498 + 402900
519 + 402921
536 + 402938
564 + 402966
578 + 402980
598 + 4021,000
602 + 4021,004
647 + 4021,049
683 + 4021,085
1,598 + 4022,000
4,598 + 4025,000
9,598 + 40210,000

FAQ

What is 578 + 402?

578 + 402 = 980

How do you check that 578 + 402 = 980?

Subtract one addend from the sum: 980 − 402 = 578, and 980 − 578 = 402. Getting the other addend back means the sum is right.

How many carries are there in 578 + 402?

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 402 + 578 the same as 578 + 402?

Yes. Addition is commutative, so both give 980; the column looks the same with either number on top.

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