Addition with Regrouping: 58 + 28

Addition with Regrouping Calculator
First addend
Second addend

What is 58 + 28?

Answer

58 + 28 =
86

With regrouping: 1 carry — into the tens

58 + 28 in a column. Carries are the small circled digits above the columns.
1carry
5 8
+28
86

Column by column: 58 + 28

  • Ones: 8 + 8 = 16 — write 6, carry 1.
  • Tens: 5 + 2 + 1 = 8 — write 8.

58 + 28 = 86

Second check: 86 − 58 = 28

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FAQ

What is 58 + 28?

58 + 28 = 86

How do you check that 58 + 28 = 86?

Subtract one addend from the sum: 86 − 28 = 58, and 86 − 58 = 28. Getting the other addend back means the sum is right.

How many carries are there in 58 + 28?

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 28 + 58 the same as 58 + 28?

Yes. Addition is commutative, so both give 86; the column looks the same with either number on top.