Addition with Regrouping: 71 + 19

Addition with Regrouping Calculator
First addend
Second addend

What is 71 + 19?

Answer

71 + 19 =
90

With regrouping: 1 carry — into the tens

71 + 19 in a column. Carries are the small circled digits above the columns.
1carry
7 1
+19
90

Column by column: 71 + 19

  • Ones: 1 + 9 = 10 — write 0, carry 1.
  • Tens: 7 + 1 + 1 = 9 — write 9.

71 + 19 = 90

Second check: 90 − 71 = 19

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FAQ

What is 71 + 19?

71 + 19 = 90

How do you check that 71 + 19 = 90?

Subtract one addend from the sum: 90 − 19 = 71, and 90 − 71 = 19. Getting the other addend back means the sum is right.

How many carries are there in 71 + 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 + 71 the same as 71 + 19?

Yes. Addition is commutative, so both give 90; the column looks the same with either number on top.

See Also