Answer:
What gets broken without being held?
I am the kind of an ant that's good at math. What am I?
You throw me out when you use me and take me in when you are done. What am I?
I am in the middle of water but am not an island.
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
Keep doing me to avoid lens dryness