Addition with Regrouping: 45 + 17

Addition with Regrouping Calculator
First addend
Second addend

What is 45 + 17?

Answer

45 + 17 =
62

With regrouping: 1 carry — into the tens

45 + 17 in a column. Carries are the small circled digits above the columns.
1carry
4 5
+17
62

Column by column: 45 + 17

  • Ones: 5 + 7 = 12 — write 2, carry 1.
  • Tens: 4 + 1 + 1 = 6 — write 6.

45 + 17 = 62

Second check: 62 − 45 = 17

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FAQ

What is 45 + 17?

45 + 17 = 62

How do you check that 45 + 17 = 62?

Subtract one addend from the sum: 62 − 17 = 45, and 62 − 45 = 17. Getting the other addend back means the sum is right.

How many carries are there in 45 + 17?

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 17 + 45 the same as 45 + 17?

Yes. Addition is commutative, so both give 62; the column looks the same with either number on top.