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发明名称
彩色算盘
摘要
一种做为计算工具,教学用具或儿童玩具的彩色算盘。其特征是无横梁,每档串有不同颜色的算珠。本实用新型由框、档和珠构成,每档九个算珠,上五珠白色,下四珠黑色。它示数简便,清零容易。珠算加减法,口诀可以减少到现有的34.5%,单位算题的拨珠次数可以减少到现有的55%。一个数和其反数同时出现,加减法可以互换,有利于求补和乘除法无诀珠算的实现,使珠算统一于笔算。
申请公布号
CN86201810U
申请公布日期
1987.07.08
申请号
CN86201810
申请日期
1986.03.26
申请人
梁晨
发明人
梁晨
分类号
G06C1/00
主分类号
G06C1/00
代理机构
代理人
主权项
1、一种做为计算工具,教学用具或儿童玩具的彩色算盘。本实用新型其特征是:没有横梁,每一档串有不同颜色的算珠,以不同的颜色帮助示数。
地址
天津市南开区六里台(天津大学331信箱)
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