Patent Document ID: 20050239023
Application ID: 10842633
Patent Flag: 0

Claim One:
1. A calculation training tool comprising: a substrate; a plurality of movable members movably mounted on said substrate and corresponding individually to individual numerals for calculations; and a sequence of numerals of 1 to 9 arranged at an interval substantially equal to a spacing width of any one of said movable members, wherein said substrate is formed into a long plate shape, wherein said movable members are arranged slidably alone a guide member disposed in a longitudinal direction of said substrate. wherein division lines are formed between adjoining numerals, wherein said guide member is a rod disposed along the longitudinal direction of an abacus, wherein said movable members are arranged by threading said rod thereinto, and wherein said numeral sequence is arranged on both sides of said movable members threaded on said rod that the numeral sequence on one side is arranged in an ascending order from 1 to 9 and the numeral sequence on the other side is arranged in a descending order from 9 to 1.