Addition with Regrouping: 123,456 + 45,089

Addition with Regrouping Calculator
First addend
Second addend

What is 123,456 + 45,089?

Answer

123,456 + 45,089 =
168,545

With regrouping: 2 carries — into the tens and the hundreds

123,456 + 45,089 in a column. Carries are the small circled digits above the columns.
1carry1carry
1 2 3 4 5 6
+45089
168545

Column by column: 123,456 + 45,089

  • Ones: 6 + 9 = 15 — write 5, carry 1.
  • Tens: 5 + 8 + 1 = 14 — write 4, carry 1.
  • Hundreds: 4 + 0 + 1 = 5 — write 5.
  • Thousands: 3 + 5 = 8 — write 8.
  • Ten thousands: 2 + 4 = 6 — write 6.
  • Hundred thousands: nothing to add — write 1.

123,456 + 45,089 = 168,545

Second check: 168,545 − 123,456 = 45,089

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FAQ

What is 123,456 + 45,089?

123,456 + 45,089 = 168,545

How do you check that 123,456 + 45,089 = 168,545?

Subtract one addend from the sum: 168,545 − 45,089 = 123,456, and 168,545 − 123,456 = 45,089. Getting the other addend back means the sum is right.

How many carries are there in 123,456 + 45,089?

2 carries: 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 45,089 + 123,456 the same as 123,456 + 45,089?

Yes. Addition is commutative, so both give 168,545; the column looks the same with either number on top.

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