Compares addition and multiplication for understanding in a story/coloring book format. Uses two characters to depict the operations: Motley Crab Adder who “just” combines when the quantities being combined do not have to be the same and Sir Crab Multiplier who combines “neatly” when they do. Integrates reading and math.

Designed to be interactive: read by the teacher as students mime the actions of Motley and Sir Crab and solve the problems in the book with counters. Includes a special section on using the Seven Intelligences based on research by Howard Gardner. Also includes an across-the-curriculum section on learning all about crustaceans and mapping where one lives relative to the nearest beach. Instructions, answers, and permission to duplicate. Grades 1-6 (depending on the problems students are asked to solve), 79 pages.