Mental Mathis a workbook devoted to mastering mental calculation for second grade students. Math researchers concur that the ability of students to make math pictures in their minds of the values and sizes of numbers readies them for learning addition, subtraction, multiplication, and more. This series will show students how to work out math problems in their minds, an important part of math proficiency. Important computation quick tips and thinking shortcuts are provided. This collection is part of the successful Singapore Mathseries, and was written in Singapore and adapted from the world-renowned Singapore math curriculum. From here, students will easily progress to the next math level. 64 reproducible pages and an answer key.