CN203825874U

CN203825874U - Pupil addition and subtraction demonstration device

Info

Publication number: CN203825874U
Application number: CN201420233874.7U
Authority: CN
Inventors: 邵长征
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-09
Filing date: 2014-05-09
Publication date: 2014-09-10
Anticipated expiration: 2024-05-09

Abstract

The utility model provides a pupil addition and subtraction demonstration device, belonging to the office product field. The pupil addition and subtraction demonstration device comprises a demonstration balance and a plurality of mass blocks marked by numbers. The balance comprises a support seat, a balance rod, a first support tray and a second support tray which are positioned on two ends of the balance rod and symmetrical; the center of the balance rod is connected to the support base through a rotation shaft; the bottoms of the first support tray and the second support tray are provided with a first minisize electronic scale and a second minisize electronic scale; a third electronic scale is positioned in proximity to the connection part between the balance rod and the support base; and the third minisize electronic scale displays the number which is the difference of the numbers shown on the first minisize electronic scale and the second minisize electronic scale. The pupil addition and subtraction demonstration device is small and portable and is easy in application, and can perform simple addition and subtraction operation according to the principle that addition is performed on same side, subtraction is performed on different sides and difference is in the middle part. The pupil addition and subtraction demonstration device demonstrates the principle of the addition and subtraction directly to the pupil, enables the pupil to have fun while learning, helps pupil to perform self-test and improves the learning efficiency.

Description

A kind of pupil's plus-minus method apparatus for demonstrating

(1) technical field

The utility model relates to the mathematics teaching aid that a kind of pupil uses, specifically a kind of pupil's plus-minus method apparatus for demonstrating.

(2) background technology

Pupil for preliminary contact plus-minus method, count the more skilled of the most of energy of number number, but just there is certain difficulty in the algorithm of study plus-minus method for a lot of pupils, in order to facilitate student when rigidly connecting tactile signed magnitude arithmetic(al), can grasp fast the art of computation, make the more directly perceived and vivid and interesting of teaching process, thereby the study enjoyment of mobilizing students is invented a kind of apparatus for demonstrating that can facilitate student to observe signed magnitude arithmetic(al) now simultaneously.

(3) summary of the invention

Technical assignment of the present utility model is for the deficiencies in the prior art, and a kind of pupil's plus-minus method apparatus for demonstrating is provided.

The utility model solves the technical scheme that its technical matters adopts:

A kind of pupil's plus-minus method apparatus for demonstrating, comprise demonstration balance and a plurality ofly indicate digital mass, described demonstration balance comprises supporting seat, balance stem, is symmetricly set on the first pallet and second pallet at balance stem two ends, the central spot of described balance stem is connected on supporting seat by rotating shaft, and described the first pallet and the second tray bottom are provided with the first miniature electronic and claim to claim with the second miniature electronic; The junction of close balance stem and supporting seat is provided with the 3rd miniature electronic and claims, and the numeral that described the 3rd miniature electronic deserves to be called demonstration equals the digital difference that the first miniature electronic claims to claim with the second miniature electronic demonstration; The numeral that described mass is marked with is the weight of mass itself.

For convenience of student, mass difference is come, conveniently carry out computing, the cross sectional shape of described mass is respectively rectangle, circle, triangle and polygon.

Compared with prior art, the beneficial effect producing is a kind of pupil's plus-minus method apparatus for demonstrating of the present utility model:

The utility model carries out simple signed magnitude arithmetic(al) according to the computing method of " homonymy is added, heteropleural subtracts each other, middle for poor ", in giving lessons process, teacher can to student, demonstrate plus-minus method principle intuitively, can carry out the comprehensive computing of single additive operation, subtraction and plus-minus method, easy to operate, make in playing, to acquire in student, can beat well the rudimentary knowledge of firm pupil's primary learning plus-minus method; Can help student to carry out oneself and detect, improve learning efficiency simultaneously; And the utility model is small and exquisite portable, application is convenient.

(4) accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model.

In figure, 1, mass, 2, supporting seat, 3, balance stem, the 4, first pallet, the 5, second pallet, the 6, first miniature electronic claims, and the 7, second miniature electronic claims, and the 8, the 3rd miniature electronic claims, 9, rotating shaft.

(5) embodiment

Below in conjunction with 1 pair of a kind of pupil's plus-minus method apparatus for demonstrating of the present utility model of accompanying drawing, be described in detail below.

As shown in Figure 1, a kind of pupil's plus-minus method apparatus for demonstrating of the present utility model, its structure comprises demonstration balance and a plurality of digital mass 1 that indicates, described demonstration balance comprises supporting seat 2, balance stem 3, is symmetricly set on the first pallet 4 and second pallet 5 at balance stem 3 two ends, the central spot of described balance stem 3 is connected on supporting seat 2 by rotating shaft 9, and described the first pallet 4 and the second pallet 5 bottoms are provided with the first miniature electronic and claim the 6 and second miniature electronic to claim 7; Near the junction of balance stem 3 and supporting seat 2, be provided with the 3rd miniature electronic and claim 8, and described the 3rd miniature electronic claims the numeral showing on 8 to equal the first miniature electronic to claim the 6 and second miniature electronic to claim the digital difference of 7 demonstrations; The numeral that described mass 1 is marked with is the weight of mass 1 own, and the cross sectional shape of mass 1 is respectively rectangle, circle, triangle and polygon,

While using the utility model, according to the computing method of " homonymy is added, heteropleural subtracts each other, middle for poor ", carry out simple signed magnitude arithmetic(al).The different mass 1 of selected shape is placed on and in homonymy pallet, carries out additive operation, the first miniature electronic claim the 6 or second miniature electronic claim the numeral showing on 7 be addend and; The different single mass 1 of selected shape is placed on and in heteropleural pallet, carries out subtraction, and the first pallet 4 interior placements is minuend, the second pallet 5 interior placements be subtrahend, the 3rd miniature electronic claims on 8 to show mass 1 in the first pallet 4 and the digital difference of the mass 1 in the second pallet 5; The different a plurality of masses 1 of selected shape be placed in homonymy, heteropleural pallet add, subtraction, and a plurality of masses 1 sum of the first pallet 4 interior placements is as minuend, a plurality of masses 1 sum of the second pallet 5 interior placements is as subtrahend, the first miniature electronic claims to show on 6 the summation of the interior a plurality of masses 1 of the first pallet 4, the second miniature electronic claims to show on 7 the summation of the interior a plurality of masses 1 of the second pallet 5, and the 3rd miniature electronic 8 deserves to be called and shows the poor of numeral that the first miniature electronic claims that the 7 and second miniature electronic claims 8 demonstrations.

A kind of its processing and fabricating of pupil's plus-minus method apparatus for demonstrating of the present utility model is simple and convenient, processing and fabricating shown in by specification accompanying drawing.

Except the technical characterictic described in instructions, be the known technology of those skilled in the art.

Claims

1. pupil's plus-minus method apparatus for demonstrating, comprise demonstration balance and a plurality ofly indicate digital mass, it is characterized in that: described demonstration balance comprises supporting seat, balance stem, is symmetricly set on the first pallet and second pallet at balance stem two ends, the central spot of described balance stem is connected on supporting seat by rotating shaft, and described the first pallet and the second tray bottom are provided with the first miniature electronic and claim to claim with the second miniature electronic; The junction of close balance stem and supporting seat is provided with the 3rd miniature electronic and claims, and the numeral that described the 3rd miniature electronic deserves to be called demonstration equals the digital difference that the first miniature electronic claims to claim with the second miniature electronic demonstration; The numeral that described mass is marked with is the weight of mass itself.

2. a kind of pupil's plus-minus method apparatus for demonstrating according to claim 1, is characterized in that: the cross sectional shape of described mass is respectively rectangle, circle, triangle and polygon.