Book 1D covers numbers greater than 100, measurements (including lengths, days, and time) and problem solving using grids, coordinates, directions, and order).
Beast Academy provides a fun, rigorous, challenging, complete curriculum for aspiring math beasts. BA Level 1D includes chapters on big numbers, measurement, and problem solving.
The book includes Guide sections written in an engaging comic book style, and over 400 practice problems ranging from introductory level exercises to very challenging puzzles and word problems.
