Title: Abacus for bead mental arithmetic
Application Number: 200520030988 Application Date: 2005.06.09
Publication Number: 000000000 Publication Date:
Approval Pub. Date: 2006.07.19 Granted Pub. Date: 2006.07.19
International Classifi-cation: G06C1/00
Applicant(s) Name: Yang Likang Address:
Inventor(s) Name: Yang Likang;Li Xiangzhen;et al.
Attorney & Agent: wang fan
Abstract:
    The utility model relates to an abacus comprising a frame, a beam, steps and beads on the step. The backside of the abacus is equipped with an abacus plate which is fixedly connected with the abacus frame. And the abacus plate is equipped with a frame and a beam. One end of the beam is equipped with several position points. And the middle part of the abacus plate and the other end are equipped with several steps. The several steps on the other end of the abacus plate is equipped with replica beads. The abacus can conduct real shift computation and free shift mental calculation; and it is suitable for bead mental calculators of primary, junior and senior level. It can train the bead mental calculation from easy to difficult and speed up the bead mental calculation exercise; more children and adolescents are made to do the bead mental calculation training.
Time: 5