Addition with Regrouping: 123,456 + 1,234

Addition with Regrouping Calculator
First addend
Second addend

What is 123,456 + 1,234?

Answer

123,456 + 1,234 =
124,690

With regrouping: 1 carry — into the tens

123,456 + 1,234 in a column. Carries are the small circled digits above the columns.
1carry
1 2 3 4 5 6
+1234
124690

Column by column: 123,456 + 1,234

  • Ones: 6 + 4 = 10 — write 0, carry 1.
  • Tens: 5 + 3 + 1 = 9 — write 9.
  • Hundreds: 4 + 2 = 6 — write 6.
  • Thousands: 3 + 1 = 4 — write 4.
  • Ten thousands: nothing to add — write 2.
  • Hundred thousands: nothing to add — write 1.

123,456 + 1,234 = 124,690

Second check: 124,690 − 123,456 = 1,234

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Column additions with 1,234

ExampleSum
1,234 + 1,2342,468
2,468 + 1,2343,702
3,579 + 1,2344,813
4,805 + 1,2346,039
5,096 + 1,2346,330
6,713 + 1,2347,947
7,350 + 1,2348,584
8,042 + 1,2349,276
12,345 + 1,23413,579
23,456 + 1,23424,690
45,089 + 1,23446,323
70,312 + 1,23471,546
123,456 + 1,234124,690
405,067 + 1,234406,301
987,654 + 1,234988,888

FAQ

What is 123,456 + 1,234?

123,456 + 1,234 = 124,690

How do you check that 123,456 + 1,234 = 124,690?

Subtract one addend from the sum: 124,690 − 1,234 = 123,456, and 124,690 − 123,456 = 1,234. Getting the other addend back means the sum is right.

How many carries are there in 123,456 + 1,234?

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 1,234 + 123,456 the same as 123,456 + 1,234?

Yes. Addition is commutative, so both give 124,690; the column looks the same with either number on top.

See Also