The revised edition of the book Math Plus — A Book of Mental Mathematics, Book-1 (for Class 1) is part of the series Maths Plus — A Book of Mental Mathematics (Books 1 to 8). This is an innovative series meant for Primary and Middle classes to enhance the mental agility of the learners. This book departs from the traditional approach of teaching Mental Mathematics. In the traditional approach, each assignment was a mix-up of different mathematical concepts. But in this book, each assignment covers up only one concept. Also, the assignments in this book have been prepared keeping in mind the sequence followed by the latest NCERT syllabus.Each assignment in the book covers the chapter/concept taught in the textbook based on the latest NCERT syllabus.