Category : 2nd Class
In this addition only two numbers are involved for example,
It is a single digit addition but when we have more than one digits in numbers, the rules given below will be applied:
Start addition with the 1st digit from right then 2nd digit from the right and the process goes on. In another words, add ones 1st, then tens, then hundreds and so on.
If addition of ones gives result in 2 digits then add the left digit of the result with tens and the process goes on.
Here, the left El of n is added to  as below:
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