CN2567616Y - 九珠算盘 - Google Patents

九珠算盘 Download PDF

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Publication number
CN2567616Y
CN2567616Y CN 01233790 CN01233790U CN2567616Y CN 2567616 Y CN2567616 Y CN 2567616Y CN 01233790 CN01233790 CN 01233790 CN 01233790 U CN01233790 U CN 01233790U CN 2567616 Y CN2567616 Y CN 2567616Y
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model
utility
abacus
beads
students
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段怀远
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Abstract

一种适合于小学中低年级学生运用珠算计算的教学用具——九珠算盘,形状呈长方形,由框、杆、珠组成,其中框中有杆,每根杆串有九个珠子。在计算操作时不用整珠,不分颠倒,操作口决简单易记,易学。具有结构简单,材料易购,成本低廉,携带方便,易推广普及等优点,能开发学生的智力和培养学生的实际操作能力。具有广阔的市场前景。

Description

九珠算盘
技术领域
本实用新型是一种教学用具,特别适合小学中低年级学生学习珠算计算和幼儿数数练习。
背景技术
目前,珠算教学从小学二至四年级均安排,大约要一百多个课时才能完成教学任务,并且在珠算计算时口诀繁杂,操作难度大,学生难以理解和掌握。
发明内容
本实用新型的目的是提供一种计算操作时不用整珠、不分颠倒、操作简单、口诀易记易学,能开发学生的智力和培养学生的实际操作能力的直观快捷的教学用具。
本实用新型具有结构简单、材料易购、成本低廉、携带方便、易普及推广、经久耐用等优点,具有广阔的市场前景。
本实用新型的目的是这样实现的:九珠算盘呈长方形状,由框、杆、珠组成,其中框中有十三根杆,每根杆上串九个珠子。在使用九珠算盘进行计算时,因自然数中最大的数是九,即每杆最多能打九个珠,如果满十,必须向上一位进一。在使用九珠算盘进行加法计算时,只有两种口诀,即不满十时“几上几”和满十时“进一减补数”。在计算减法时,即够减时“几去几”,不够减时“破十退一加补数”。在计算乘法时,只要会乘法口诀和上面说的口诀,即可进行计算。在计算除法时,只要会试商和上面的口诀即可。
附图说明
图1是本实用新型的正面直观图。
图中:1框  2杆  3珠  4  红珠
在图中,每根杆上的第五颗珠子染成红色,即红珠(4)它是为计算时醒目而准确快捷的拨珠的标记。
具体实施方式
本实用新型是这样使用的:在计算加法时,如7+8=15,因满十,所以向前一位进一,在本杆上减去二,(因八的补数是二)。在计算减法时,如16-7=9,因本杆不够减,要破十,所以要从前一位退一,在本杆上加补数3(因七的补数是三)。在计算乘法时,如67×9=603,口诀是:九七六十三,(将七去一,下杆上三);九六五十四,(将六去一,下杆加四,因满十,四的补数是六,进一减六)。在计算除法时,如603÷9=67,口诀是60除以9商6(六九五十四、五去五、四去一加六),下余63,63除以9商7(七九六十三、六去六、三去三)。计算完成。

Claims (1)

  1. 一种九珠算盘,其特征是:呈长方形形状,主要由框、杆、珠组成,框中有十三根杆,每根杆上串有九个珠子,并且每根杆上的第五棵珠子染成红色。
CN 01233790 2001-08-07 2001-08-07 九珠算盘 Expired - Fee Related CN2567616Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01233790 CN2567616Y (zh) 2001-08-07 2001-08-07 九珠算盘

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01233790 CN2567616Y (zh) 2001-08-07 2001-08-07 九珠算盘

Publications (1)

Publication Number Publication Date
CN2567616Y true CN2567616Y (zh) 2003-08-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 01233790 Expired - Fee Related CN2567616Y (zh) 2001-08-07 2001-08-07 九珠算盘

Country Status (1)

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CN (1) CN2567616Y (zh)

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