Long Addition Calculator
Add two numbers, column by column.
Long addition lines up numbers by place value and adds each column, carrying when a column exceeds 9.
The math behind it
Add the ones, then tens, then hundreds, carrying any tens digit into the next column.
Worked example
4567 + 8925 = 13492.
FAQ
What is carrying?
When a column sum is 10 or more, the tens part moves to the next column on the left.