Base 10 Addition: When we count the numbers when 10 comes put just dot(.) instead of 10. In column addition we found this type of method. for this method we add single digit addition
that is
1
2
3
4 . (ten)
5
6 . (ten 1 carry )
7
8 . ( ten 6 carry)
9 . (ten 5 carry )
8 . ( ten 3 carry )
7 . ( ten)
6 ( six only )
_____________
66
_______________
then count tens from starting to bottom we got 6 tens that is 60 and last one is 6 to add this two we got 66 answer to above addition.