CN2053358U

CN2053358U - Arithmetic disk of infinite interest for basic mathematics

Info

Publication number: CN2053358U
Application number: CN 88215990
Authority: CN
Inventors: 熊志贤
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-11-10
Filing date: 1988-11-10
Publication date: 1990-02-21

Abstract

The utility model discloses an arithmetic disk of infinite interest for basic mathematics, relating to a learning aid for matching with the teaching material of lower grades and for developing the intelligence of children. The arithmetic disk of infinite interest for basic mathematics is composed of an upper rotary disk, a lower rotary disk, and a middle rotary disk, wherein, a movable valve is arranged between the upper rotary disk and the middle rotary disk, and a movable valve is also arranged between the lower rotary disk and the middle rotary disk, and the movable valve are connected with the rotary disks as a whole by clinch bolts. The middle disk is provided with addition and subtraction of figures within 10, and carry addition and abdication subtraction within 20. The arithmetic disk of infinite interest for basic mathematics is particularly suitable for the pupils of the first and the second grade of primary school and the preschool children.

Description

Arithmetic disk of infinite interest for basic mathematics

The utility model belongs to the learning aid of and exploitation children's intelligence supporting with the primary grades teaching material.

Before the utility model is made, on the market except that traditional building blocks that can Enlightenment of Intelligence, Chinese and set phrase building blocks, Chinese phonetic alphabet building blocks, that can improve children's computing power is one group 10 and calculates boards with interior several plus-minus method, this board has five grades, form by three slide blocks in upper, middle and lower for every grade, in upper and lower shelves, indicate 10 respectively with interior each number, and a side is provided with a display window, is arranged with corresponding upper and lower grade 10 with interior plus-minus method and answer on middle-grade.Though this structure simply is easy to do, they are still in shortcomings such as neither system are also imperfect, and form dullness, purpose are not strong.

The purpose of this utility model promptly is in order to address the above problem, in research distribution of educational material system, and on principle and the national syllabus basis, the learning aid of loving in conjunction with not only matching of designing of juvenile's psychology but also for children with teaching material.

Structure of the present utility model: form by three rotating disks in upper, middle and lower, the likeness in form table tennis bat, between last, turntable and time, be equipped with a moving valve between the turntable, they are linked to be an integral body by rivet.The head end of described moving valve inserts in the rotating disk handle, and tail end is provided with the rectangular slot of a control scope of activities, and the centre is provided with a rectangle window, is provided with a crossbeam (computing is made bracket and used) that is used for changing basic formula in this window.Upper and lower rotating disk all indicates title, counting, character and the sign of operation of computing dish content, is having a rectangular display window with moving valve window corresponding position.Middle rotating disk is provided with " 10 plus-minus method with interior number ", the basic formula of " 20 with the carry addition of interior number and the subtraction of giving up the throne " and " the interior multiplication and division of table " three groups of contents by primary school's " mathematics " first and second and the layout of the 3rd teaching substance, rotation by moving valve push-and-pull and rotating disk, what can demonstrate 1008 roads reflection one digit number adds and corresponding subtraction the whole basic formula of one digit number multiplication and corresponding division.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the front view of the utility model moving valve; Fig. 2 is a front view of the present utility model, among the figure, 1 is top rotary table, and 2 is lower rotary table, 3 is middle the commentaries on classics, 4 is moving valve, and 5 is the rotating disk display window, and 6 is the rotating disk handle, 7 is rivet, 8 is moving valve display base calculation plinth formula window, and 9 are the crossbeam in the window (making bracket in the computing uses), 10 elongated slots for control moving valve scope of activities.

Advantage of the present utility model: modern design, scientific structure, the advanced person, easy to use, interesting strong, the practical value height.

The embodiment that this reality is novel: it forms an arithmetic system by the computing dish of three groups of likeness in form table tennis bats, what first group middle rotating disk was arranged is the basic formula of " 10 with interior several plus-minus method ", second group middle rotating disk is arranged is " 20 basic formulas; what the 3rd group middle rotating disk was arranged is the basic formula of " multiplication and division in the table " with the interior carry addition and the subtraction of giving up the throne; every group of computing dish all be by radius be 72mm length * wide for top rotary table (1) lower rotary table (2) turntable (3) of 26mm * 33mm handle (6) and two long * widely be the moving valve of 145mm * 30mm (4), be linked to be an integral body by rivet (7).Upper and lower rotating disk respectively have one long * widely be the window of 35mm * 6mm, that the moving valve tail end has is long * widely be the groove of 32mm * 6mm (10), the centre have one long * widely be the window of 56mm * 10mm (8), be useful in the window that the conversion formula is wide to be the crossbeam of 7mm (9).The utlity model has and recognize number and calculate six kinds of functions, different formulas will appear as long as rotate rotating disk, and each formula is shifted one's position by moving valve (4) push-and-pull and four basic formulas can be occurred and provide answer, is as Fig. 2: moving valve 1+9=when being in position (1)? when being in position (2), provide answer 1+9=10, when being in position (3), be ()+9=10, when being in position (4), be 1() during 9=10, when being in position (5), be 1+()=10, if on, contrary formula can appear in the following moving valve alignment computing dish that overturns simultaneously.Total system basis, 1008 roads formula can occur by rotating disk and moving valve evolution.Described rotating disk and moving valve can adopt multiple film cardboard, approach making such as moulding plate.

Claims

A kind of entertaining background mathematics computing dish, it is by top rotary table (1), lower rotary table (2) and turntable (3) are formed, its feature: be equipped with a moving valve (4) between top rotary table and the turntable and between lower rotary table and the turntable, be linked to be an integral body by rivet (7) and rotating disk, on, lower rotary table and moving valve corresponding position are respectively equipped with the rectangle window (5) of display base formula, turntable is provided with by primary school's " mathematics " first, " 10 the plus-minus method " of two and the 3rd teaching substances layout with interior number, " 20 with the interior carry addition and the subtraction of giving up the throne ", the basic formula of " multiplication and division in the table " three groups of contents, by the push-and-pull of moving valve and the rotation of rotating disk, three groups can show basis, 1008 roads formula topic altogether.