Adding Large Numbers in Columns

Suppose we want to add 26 and 79
Stack the numbers one on top of another so that the ones digits line up in a column and the tens digits line up in another column.
Add column by column, starting from the ones column on the right.

First add the ones column:
The sum is a two-digit number so you need to write down the ones digit of that number and carry
the tens digit over to the next column to the left, write this digit above the column so you can add it with the rest of the numbers in that column.
Next, move to the tens column:
Because this is the last column to add we write down the sum, we don’t have to carry.
This problem shows you that 26+79 =105

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