Addition with Regrouping: 405,067 + 123,456

Addition with Regrouping Calculator
First addend
Second addend

What is 405,067 + 123,456?

Answer

405,067 + 123,456 =
528,523

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

405,067 + 123,456 in a column. Carries are the small circled digits above the columns.
1carry1carry
4 0 5 0 6 7
+123456
528523

Column by column: 405,067 + 123,456

  • Ones: 7 + 6 = 13 — write 3, carry 1.
  • Tens: 6 + 5 + 1 = 12 — write 2, carry 1.
  • Hundreds: 0 + 4 + 1 = 5 — write 5.
  • Thousands: 5 + 3 = 8 — write 8.
  • Ten thousands: 0 + 2 = 2 — write 2.
  • Hundred thousands: 4 + 1 = 5 — write 5.

405,067 + 123,456 = 528,523

Second check: 528,523 − 405,067 = 123,456

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Column additions with 123,456

ExampleSum
405,062 + 123,456528,518
405,063 + 123,456528,519
405,064 + 123,456528,520
405,065 + 123,456528,521
405,066 + 123,456528,522
405,067 + 123,456528,523
405,068 + 123,456528,524
405,069 + 123,456528,525
405,070 + 123,456528,526
405,071 + 123,456528,527
405,072 + 123,456528,528

FAQ

What is 405,067 + 123,456?

405,067 + 123,456 = 528,523

How do you check that 405,067 + 123,456 = 528,523?

Subtract one addend from the sum: 528,523 − 123,456 = 405,067, and 528,523 − 405,067 = 123,456. Getting the other addend back means the sum is right.

How many carries are there in 405,067 + 123,456?

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 123,456 + 405,067 the same as 405,067 + 123,456?

Yes. Addition is commutative, so both give 528,523; the column looks the same with either number on top.

See Also