CN2073608U

CN2073608U - Child and puple's mathematic board

Info

Publication number: CN2073608U
Application number: CN 90211122
Authority: CN
Inventors: 刘铁钢
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-02-12
Filing date: 1990-02-12
Publication date: 1991-03-20

Abstract

The utility model relates to a child and pupil's mathematic board. A rotary board is folded on a character board, the center point is penetrated and fixed by a fastener, the rotary board and the character board are equally divided into corresponding sectors and concentric circles according to the mathematic operation range, the sectors and the concentric circles are distributed with digits and windows, the rotary board is rotated on the character board, addition and subtraction or division and multiplication operations can be performed, and the result is displayed on the child and pupil's mathematic board visually. The utility model has the advantages of simple manufacture, low cost, easy mastering, and great help to the intelligence development of children and pupils.

Description

Child and puple's mathematic board

The utility model relates to a kind of mathematics utensil.

People are when teaching child and pupil to learn plus-minus method or multiplication and division now, all be to write on the blackboard or on the paper by the teacher or the head of a family, or use bookish multiplication formula table, or use the individual digit card to impart knowledge to students, the teacher and the head of a family's labour intensity is big, children learn also gruelling, especially the operation relation between firm contact number of child and pupil and the number learns off multiplication pithy formula and has a lot of difficulties, and child and pupil grasp slowly, lack interest, no audiovisual aids.

The purpose of this utility model is to provide a kind of and makes simply, cost is low, intuitively easily grasp, can alleviate the teacher and the head of a family's labour intensity, helps a kind of mathematics disc of child and pupil's learning mathematics.

Fig. 1,8 is the utility model structure cut-open view;

Fig. 2,3 is the utility model structure front elevation;

Fig. 4,5 is the rotating disc front elevation;

Fig. 6,7 is the letter disk front elevation.

The utility model such as Fig. 1, Fig. 2, shown in Figure 3, has rotating disc (1), letter disk (2), securing member (3), rotating disc (1) is stacked on the letter disk (2), securing member (3) passes the center of rotating disc (1) and letter disk (2) and fixes, rotating disc has been arranged numeral on (1), have simultaneously by the tactic square hole of spiral, be numerical aperture (4), see Fig. 4, shown in Figure 5, rotating disc (1) concrete structure is as follows: the concentric circles that circle is divided into the fan-shaped and some of some, wherein have one fan-shaped be further divided into two little fan-shaped, fill in operation rule and symbol, in the little lattice that other fan-shaped and concentric circles are cut apart, fill in natural number in the little lattice of the concentric circles of outermost, such as 0,1,2 ... 10, or 1,2,3 ... 11, numerical aperture (4), then from the little lattice of bosom concentric circles, open a numerical aperture for each fan-shaped, in the direction of the clock or counterclockwise, consist of helical pattern; Letter disk (2) concrete structure is as follows: referring to Fig. 6, Fig. 7, circle is divided into the concentric circles of the fan-shaped and some of some, fan-shaped number and rotating disc with, the concentric circles number then manys two than rotating disc, wherein have one fan-shaped be further divided into two little fan-shaped, fill in operation rule and symbol, in the little lattice that other are fan-shaped and concentric circles is cut apart, fill in natural number, such as 0,1,2,3,10,1,2,3 ... 11,2,3,4 ... 12 ..., 10,11,12 ... 20, or 0,0,0 ... 0,1,2,3,4 ... 11,2,4,6,8 ... 22 ... 10,20,30 ... 110, but do not arrange numeral near several concentric circles of outermost.

Certainly, can both draw on the two sides of a disk that five equilibrium is fan-shaped, concentric circles, fill in operation rule, symbol, natural number, constituting the two sides all is letter disk (2), with two rotating discs (1) apportion both sides, its center links together by securing member (3) and letter disk (2) center, mathematics disc of same formation is referring to Fig. 8.

When rotating disc (1) upward is the center rotation with securing member (3) at letter disk (2), fan-shaped on the fan-shaped and letter disk (2) on the rotating disc (1) on time, number is seen in the location, the numeral of letter disk (2) outermost promptly is a summand, numeral on the rotating disc (1) is addend, square hole be numerical aperture (4) on the contrary in the numeral that shows be and be subtraction, as be multiplication and division, then the numeral of letter disk (2) outermost is a multiplicand, numeral on the rotating disc (1) is a multiplier, square hole is that the numeral that shows in the numerical aperture (4) is long-pending, otherwise is division, in a word, fan-shaped with each is that junior unit carries out computing.

Make mathematics disc and can adopt plastic plate or plank or offset printing cardboard, securing member can adopt fastening rivet.

This child and pupil's mathematics disc is made simple, low, the easy grasp of cost, and is directly perceived, labour intensity, help child and the pupil that can alleviate the teacher and the head of a family grasp operation law rapidly, strengthening formula memory, improve learning ability, is a kind of teaching appliance preferably.

Claims

1, a kind of child and pupil's mathematics disc, it is characterized in that having rotating disc (1), letter disk (2), securing member (3), rotating disc (1) are stacked on the letter disk (2), securing member (3) passes the center fixation of rotating disc (1) and letter disk (2), rotating disc has been arranged numeral on (1), have simultaneously by the tactic square hole of spiral, i.e. numerical aperture (4).

2, mathematics disc according to the child and the pupil of claim 1, it is characterized in that rotating disc (1) is divided into circle the concentric circles of the fan-shaped and some of some, wherein have one fan-shaped be further divided into two little fan-shaped, fill in operation rule and symbol, in the little lattice that other are fan-shaped and concentric circles is cut apart, the little lattice of the concentric circles of outermost are filled in natural number 0,1,2,10, or 1,2,3,11, numerical aperture (4) is then from the little lattice of concentric circles in bosom, open a numerical aperture for each fan-shaped, in the direction of the clock or counterclockwise, constitute helical pattern, letter disk (2) is divided into circle the concentric circles of the fan-shaped and some of some, wherein have one fan-shaped be further divided into two little fan-shaped, fill in operation rule and symbol, in the little lattice that other are fan-shaped and concentric circles is cut apart, fill in natural number 0,1,2,3,10,1,2,3,11,2,3,4 ... 12 ..., 10,11,12 ... 20 or 0,0,0 ... 0,1,2,3 ... 11,2,4,6 ... 22 ..., 10,20,30 ... 110.

3, according to the child and the pupil's of claim 1 mathematics disc, the two sides that it is characterized in that a disk all is letter disk (2), and with two rotating discs (1) apportion both sides, its center links together by securing member (3) and letter disk (2) center.