5. Each month for 9 months, Earl read 7 books. His goal
   was to read 81 books this year. How many more books
   does Earl need to read to achieve his goal?

Earl has read a total of 63 books so far (7 books per month for 9 months). With his goal set at 81 books, we can determine how many more he needs to read by subtracting the books he has read from his goal: 81 - 63 = 18. So, Earl needs to read 18 more books to reach his reading goal for the year. Keep at it, Earl! Happy reading!

To help with his goal, Earl can consider setting mini-goals such as reading a book a week or joining a book club. Planning his reading schedule and setting time aside can make a big difference. Acknowledge that life can get busy, so staying flexible with time management will help whenever he needs to adjust his plan for reading!