Wisetime 9 Spikes Abacus is available in Counting Frames

Students learn how do large numbers addtion & substraction. On one side of abacus ( o-t-h-th-tth-l-tl-c-tc ) is printed on another side ( international number system symbols ( u-t-h-th-tth-hth-m-tm-hm) is printed which help students to do acitivites in both indian & international number system