b' About the Book: Mastering Mathematics Book 4 For Primary Classes\n\nThis series is written to meet the aims and objectives of teaching mathematics\nat primary stage for the schools following the syllabi prepared by the\nInter-state Board for Anglo-Indian Education. Core mathematical concepts have\nbeen presented in an innovative and lucid manner. Use of language has been kept\nat a minimum. Presentation of matter is activity-based and in spiral order.\nStereotype questions have been avoided. Questions are given in story form, in\nthe form of number puzzle, etc. Thought-provoking questions are also given under\nthe heading Put on your Thinking Cap. The series has been prepared to '