“ABACUS – Level 4 OF 8 SERIES BOOK“is a unique book designed and published by Nava Vision for youngsters aged 3 and aboveto expose students to different problems to attain a better usage of Abacus.Producing this book is indeed a group effort of our Nava Vision Team to help getting the valuable and unique content, binding up expertly steered the project. This unique book promotes improvement of brain growth, creativity, personality development in young children. This book starts with the review of important topics present in Level 3 of 8 Series Book and then on higher level of basic arithmetic calculations like3-digit Addition & Subtraction, Multiplication of 2, 3-digit numbers with single digit numbers, division of 1-digit divisor with 2-digit dividend using Abacus representations. We have provided with many learning sessions for the students to practise and learn concepts. It also concentrates on mental Abacus which is very crucial, as it improves imagination and, students need to be independent of the Abacus once they are well versed with the arrangement of beads. This book will inculcate the best practise of using mental abacus in early ages of a child’s life. SALIENT FEATURES OF ABACUS:  Removes fear of Mathematics  Enables strong Logical thinking & Problem-Solving skills  Enables Faster Calculations  Improves Concentration  Encourages Mental Calculations  Encourages Multi-Dimensional Thinking  Develops Creativity Copyright © 2018 by Nava Vision All rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author. Copyright © 2018 by Nava Vision All rights reserved. This book or any portion thereof may not be reproduced or used in any manner whatsoever without the express written permission of the author.