Publisher's Synopsis
Sumus is a young noble mouse looking for a mental mathematical adventure. He wants to be like his heroes, the famous King's Mosquemats: Subtractus, Dívidus and Múltiplus. But on the way he will meet Count Catulus, a cunning cat who wants to usurp the Can you use your addition, subtraction, multiplication and division skills to help Sumus become a Muskematist and save the kingdom? Follow the story and learn all kinds of tricks to make your mental math skills as sharp as the Mosquemats.
