Strengthens computation, problem solving, & mental math! The fun, mind-stretching puzzles in this 44-page printable eBook for grades 5, 6, and 7 (ages 10-13) develop students' basic math skills including the ability to compute, estimate, create tables and charts, and explain their answer processes orally and in writing. These activities were designed to introduce and reinforce mathematical concepts in a quick, fun way. They emphasize logic and reasoning skills needed to build a strong foundati