Final answer:
To buy a California Math Common Core Course 3 Volume 1 answer key, check the publisher's website, educational resource stores, or ask the teacher for authorized resources.
Step-by-step explanation:
To purchase a California Math Common Core Course 3 Volume 1 answer key, you have a few options. You can often find answer keys through the publisher's website or educational resource stores. It's important to ensure you're looking for the authorized version to comply with copyright laws and any school policies. Sometimes, educational stores provide teacher editions, which include full answer keys, but these are typically intended for classroom instructors. Otherwise, you can reach out to the teacher for guidance, use online tutoring services, or join study groups where you can get help in understanding the problems. Remember that using answer keys for educational purposes is important to ensure a solid understanding rather than just copying answers.