This is a mini bookstore. There are ten books about sports. They are on Shelf A. There are nine books about History. They are on Shelf B. There are eleven books about games. They are on Shelf C. There are fifteen books about English. They are on Shelf D. How many books are there on Shelf A,B,C and D? Do you know? ,. 1-4,5. How many books are there in all ?
forty thirty-five forty-five forty-one