(1) What is the common term of this notion (a+b) in the "vertical way":
a
+
b
(2) Is there a advantages in this that other haven't?
(*)Is the techinical name of this operation is only and only called vertical addition?
Is this techinical name also in use in kindergathen?
(*)Is there a math option that in this forum to write this thing so it look better?
If there is, it will be good.
And some instruction to do it will be helpful.
If there isn't this possibilty I think you may add it.
Going in reverse order.(*)Is the techinical name of this operation is only and only called vertical addition?
Is this techinical name also in use in kindergathen?
I suspect most kindergarten teachers try to avoid technical vocabulary: most children at that age have relatively limited vocabularies.
"Columnar addition" is a term that I have seen and that is, in my opinion, more descriptive.
(*)Is the techinical name of this operation is only and only called vertical addition?
Is this techinical name also in use in kindergathen?
(*)Is there a math option that in this forum to write this thing so it look better?
If there is, it will be good.
And some instruction to do it will be helpful.
If there isn't this possibilty I think you may add it.