Makayla and three of her friends volunteered to collect children’s books for the cities homeless shelters. There are four homeless shelters in the area and each shelter received 18 bucks. How many books did Michaela and her friends collect altogether?
Since each shelter received 18 books, and there are 4 shelters in total, the total number of books collected is:
18 books per shelter * 4 shelters = 72 books
Therefore, Makayla and her friends collected 72 books altogether.