Five-year-old Salma wants to know how old each of her cousins are. Can you help her subtract to figure it out?This book is an educational short story designed for children to learn how to subtract. It shows that there's joy to be found in doing math, and that math with family can be fun About the AuthorElham Morgan is a retired teacher with a master's degree in curriculum and education from Portland State University, a bachelor's degree in health science from San Francisco State University, and fifteen years of experience in teaching, both overseas and in the United States.