Addition with Regrouping: 123,456 + 23,456

Addition with Regrouping Calculator
First addend
Second addend

What is 123,456 + 23,456?

Answer

123,456 + 23,456 =
146,912

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

123,456 + 23,456 in a column. Carries are the small circled digits above the columns.
1carry1carry
1 2 3 4 5 6
+23456
146912

Column by column: 123,456 + 23,456

  • Ones: 6 + 6 = 12 — write 2, carry 1.
  • Tens: 5 + 5 + 1 = 11 — write 1, carry 1.
  • Hundreds: 4 + 4 + 1 = 9 — write 9.
  • Thousands: 3 + 3 = 6 — write 6.
  • Ten thousands: 2 + 2 = 4 — write 4.
  • Hundred thousands: nothing to add — write 1.

123,456 + 23,456 = 146,912

Second check: 146,912 − 123,456 = 23,456

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Column additions with 23,456

ExampleSum
123,451 + 23,456146,907
123,452 + 23,456146,908
123,453 + 23,456146,909
123,454 + 23,456146,910
123,455 + 23,456146,911
123,456 + 23,456146,912
123,457 + 23,456146,913
123,458 + 23,456146,914
123,459 + 23,456146,915
123,460 + 23,456146,916
123,461 + 23,456146,917

FAQ

What is 123,456 + 23,456?

123,456 + 23,456 = 146,912

How do you check that 123,456 + 23,456 = 146,912?

Subtract one addend from the sum: 146,912 − 23,456 = 123,456, and 146,912 − 123,456 = 23,456. Getting the other addend back means the sum is right.

How many carries are there in 123,456 + 23,456?

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 23,456 + 123,456 the same as 123,456 + 23,456?

Yes. Addition is commutative, so both give 146,912; the column looks the same with either number on top.

See Also