Addition with Regrouping: 402 + 19

Addition with Regrouping Calculator
First addend
Second addend

What is 402 + 19?

Answer

402 + 19 =
421

With regrouping: 1 carry — into the tens

402 + 19 in a column. Carries are the small circled digits above the columns.
1carry
4 0 2
+19
421

Column by column: 402 + 19

  • Ones: 2 + 9 = 11 — write 1, carry 1.
  • Tens: 0 + 1 + 1 = 2 — write 2.
  • Hundreds: nothing to add — write 4.

402 + 19 = 421

Second check: 421 − 402 = 19

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FAQ

What is 402 + 19?

402 + 19 = 421

How do you check that 402 + 19 = 421?

Subtract one addend from the sum: 421 − 19 = 402, and 421 − 402 = 19. Getting the other addend back means the sum is right.

How many carries are there in 402 + 19?

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 19 + 402 the same as 402 + 19?

Yes. Addition is commutative, so both give 421; the column looks the same with either number on top.

See Also