Addition with Regrouping: 123,456 + 4,805

Addition with Regrouping Calculator
First addend
Second addend

What is 123,456 + 4,805?

Answer

123,456 + 4,805 =
128,261

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

123,456 + 4,805 in a column. Carries are the small circled digits above the columns.
1carry1carry
1 2 3 4 5 6
+4805
128261

Column by column: 123,456 + 4,805

  • Ones: 6 + 5 = 11 — write 1, carry 1.
  • Tens: 5 + 0 + 1 = 6 — write 6.
  • Hundreds: 4 + 8 = 12 — write 2, carry 1.
  • Thousands: 3 + 4 + 1 = 8 — write 8.
  • Ten thousands: nothing to add — write 2.
  • Hundred thousands: nothing to add — write 1.

123,456 + 4,805 = 128,261

Second check: 128,261 − 123,456 = 4,805

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Column additions with 4,805

ExampleSum
123,451 + 4,805128,256
123,452 + 4,805128,257
123,453 + 4,805128,258
123,454 + 4,805128,259
123,455 + 4,805128,260
123,456 + 4,805128,261
123,457 + 4,805128,262
123,458 + 4,805128,263
123,459 + 4,805128,264
123,460 + 4,805128,265
123,461 + 4,805128,266

FAQ

What is 123,456 + 4,805?

123,456 + 4,805 = 128,261

How do you check that 123,456 + 4,805 = 128,261?

Subtract one addend from the sum: 128,261 − 4,805 = 123,456, and 128,261 − 123,456 = 4,805. Getting the other addend back means the sum is right.

How many carries are there in 123,456 + 4,805?

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 4,805 + 123,456 the same as 123,456 + 4,805?

Yes. Addition is commutative, so both give 128,261; the column looks the same with either number on top.

See Also