Answer:
30 trees
Explanation:
There's 2 ways to solve this.
1. You know that it eats 5 trees 3 times a day, so you would do 5*3. After you do that you can find out thats 15 trees a day. You can do 15+15 or 15*2 (you get the same answer)
2. You can multiply them all at once since multiplication works that way. 5*3*2
5*3=15
15*2=30
Either way you get 30 trees.