Question

how to do addition ​

Answer 1

add everything what you want to add like 1+1+1...

Answer 2

Here’s what you need to do:

Line up the numbers you want to add so their ends are in line.

Add up the right-most column.

If your total is less than ten, write the total under the column. If the total is ten or more, write the second digit under the column and put the first digit under the next column to the left.

In the middle column of the first example, 7 + 6 = 13, you write a 3 under the 7 and 6 and a 1 below the next column to the right.

Go to the next column to the left and add up the numbers – and add any numbers you’ve written below this column.

In the left-hand column of the first example, 4 + 3 = 7, there’s a 1 below the column as well, so you write down 8.

Repeat Steps 3 and 4 until you run out of numbers.