how do you say scoring in spanish and we have to add iendo/ando ending to it
interesting question I hadn't thought of that one.
Do you mean scoring a goal like in soccer or another sport? or keeping score as in Ricardo's reply'
I would say it 'llevar la cuenta' (keeping the addition [of points])
these days many would have said 'mantener el score' as the English is sometimes brought into the language.
the iendo and and ending is the equivalent of ing in English.
so keeping score is 'llevando la cuenta' o 'manteniendo el score'.