J.C.
She may be 10 months old, but she's old enough to be taught between right and wrong behavior. When my kids acted up at that age I would say "Stop" and then if they didn't, I'd walk away. If you pay attention to their behavior, even if it's in a negative way, to them it's still attention. They will continue doing it for that attention. If you let her keep doing it and still try to calm her, she'll continue doing it and may even throw them more often. One time my one year old threw a fit in Meijer and I leaned down and said "Brayden, when you're done, come find me." Then I walked about 10 feet away, looked at some things on a shelf, walked farther, looked at things again, and eventually he realized that I was not going to give him any kind of reaction to his behavior. He ended up getting up and running to me. Once he got to me I said very happily "OH! You're finished! Let's keep shopping!" and I picked him up and put him back in the cart. You teach them how to act if you give into their bad behavior.