(1) How many angelfish are there? How many two kinds of angel fish are there?
13+9=22 (article)
A: There are 22 angelfish.
13+22=35 (article)
A: There are 35 kinds of angelfish.
(2) Can you ask other math questions and answer them?
Q: How many clown fish are there?
13-8=5 (article)
There are five red clown fish.