CN203894990U

CN203894990U - Demonstration device for teaching addition and subtraction of numbers within twenty for mathematical education of school for deaf-mutes

Info

Publication number: CN203894990U
Application number: CN201420225936.XU
Authority: CN
Inventors: 王玲; 王怀国
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-06
Filing date: 2014-05-06
Publication date: 2014-10-22
Anticipated expiration: 2024-05-06

Abstract

The utility model discloses a demonstration device for teaching addition and subtraction of numbers within twenty for mathematical education of the school for deaf-mutes. The device comprises a bottom board made from a plastic or wooden material, a side frame is disposed at the periphery of the bottom board, the length of the bottom board is 11 times of the length of a cube box, the upper face of the bottom board is provided with five rows of fixing grooves used for fixing two rows of cube boxes disposed thereon with each row containing 10 cube boxes which are arranged in a straight manner and can all move left and right along the corresponding fixing groove, a movable partition plate is disposed among the first row of cube boxes, the second row of cube boxes can entirely move back and forth, each cube box is covered by a lid and thus can be opened, objects are contained in the cube boxes, a group of 20 demonstration tools are applied in an assort manner, and the demonstration tools comprise plastic beads, small stones, ping-pong balls, pencils or erasers, and are configured that some are contained in the cube boxes and can be seen from above while some are contained in the cube boxes and cannot be seen from the outside. The demonstration device provided by the utility model is simple in structure and convenient to use.

Description

For the 20 plus-minus method education demonstrators with interior number of school for deaf-mutes's mathematical education

Technical field

The utility model relates to a kind of 20 plus-minus method education demonstrators with interior number for school for deaf-mutes's mathematical education, is applicable to 20 carry additions with interior number and the subtraction teaching of giving up the throne, and belongs to teaching aid field.

Background technology

At present, in mathematical education, a lot of students rely on number finger in the time of the plus-minus method calculating in 20, although number is to have got it right, but the inreal computing method of grasping, 20 while learning long number plus-minus method after with interior carry addition and the subtraction of giving up the throne being, and the basis of carrying out vertical calculating, therefore must grasp in a down-to-earth manner.20 plus-minus method with interior number calculate and seem simple, it is but very abstract that reality is got up to student explain, be difficult to understand, be not easy the learning initiative of mobilizing students, in order to improve student's learning interest, allow student can grasp in a down-to-earth manner 20 plus-minus method with interior number, make especially the 20 plus-minus method education demonstrators with interior number for school for deaf-mutes's mathematical education, help student's understand and master 20 to calculate with the plus-minus method of interior number, for the calculating of learning from now on long number is laid a solid foundation.

Summary of the invention

Problem to be solved in the utility model is to provide a kind of easy to operate, can will integrate theory with practice, for the presentation tool of 20 carry additions with interior number and the subtraction teaching of giving up the throne in primary school math teaching process.In order to address the above problem, the utility model by the following technical solutions:

A kind of 20 plus-minus method education demonstrators with interior number for school for deaf-mutes's mathematical education, this demonstration device comprises: the base plate made from plastics or wood materials, the surrounding of described base plate has frame, the length of base plate is 11 times of a square box length, above base plate, there is five-element's pickup groove, be used for fixing the described square box of two rows above, the described square box of two rows is 10 described square boxes in one line, and all can move left and right along described pickup groove, in the middle of square box described in first row, establish an active clapboard, described block board thickness is 1/10th of described square box, square box many 1/5th described in Length Ratio, width equates with described square box, described in second row, square box energy entirety moves forward and backward, above described square box, there is lid to open, the inside dress thing, the demonstration equipment that also has one group 20 of supporting application, demonstration equipment is pearl, small stone, table tennis, pencil or the rubber of plastics, to the requirement of described demonstration equipment be, some is to be contained in described square box, can see from above, and some is to be contained in described square box, can't see from the outside.

When teaching, article on square box.The first step, first with the article that can see, can improve the interest of Students ' Learning like this, can make again the calculating process of the perception number of student image, is convenient to memory; And then demonstrate with the article that can't see; Finally directly demonstrate with empty packet.The first step is seen concrete material object.Second step is the material object that can't see, can imagine, the 3rd step, does not have material object, can imagine in kind, is abstract numeral.Incremental like this, both improved the interest of Students ' Learning, meet again the rule of student's cognition: make student progressively rise to the abstract thinking stage by initial memorizing in images, thinking in images stage.The utility model is simple in structure, easy to use, in primary school teaching process, can will integrate theory with practice, facilitate student's memorizing in images, meet student taking thinking in images as basis, progressively be transitioned into the law of thought of abstract thinking, effectively improved student's learning interest, alleviated the work difficulty of teaching.Below in conjunction with drawings and Examples, the utility model is described further.

Brief description of the drawings

Fig. 1 is the structural representation of the 20 plus-minus method education demonstrators with interior number for school for deaf-mutes's mathematical education of the present utility model.

Fig. 2 utilizes the 20 concrete teaching demonstrations that carry out with the plus-minus method education demonstrator of interior number for school for deaf-mutes's mathematical education of the present utility model

In Fig. 1: 1-base plate, 2-first row square box, 3-second row square box position A, 4-second row square box position B, 5-pickup groove, 6-second row square box motion track, 7-dividing plate.

Embodiment

When teaching: the first step, first with the article that can see, can improve the interest of Students ' Learning like this, can make again the computation process of the perception number of student image, is convenient to memory; And then demonstrate with the article that can't see; Finally directly demonstrate with empty packet.The first step is seen concrete material object.Second step is the material object that can't see, can imagine.The 3rd step, does not have material object, can imagine in kind, is abstract numeral.Incremental like this, both improved the interest of Students ' Learning, meet again the rule of student's cognition: make student progressively rise to the abstract thinking stage by initial memorizing in images, thinking in images stage.

The concrete teaching demonstration that device carries out is shown in example 20 teaching of the plus-minus method with interior number for school for deaf-mutes's mathematical education of the present utility model that utilize as shown in Figure 2:

When demonstration plus-minus method, demonstrating articles for use on box, as demonstration 9+3,9 and 3 is two numbers, second row box will be placed on to position B, in first row box, puts 9, in second row box, put 3, how many put question to: 9 add equals 10? 9+(1)=10, are then divided into 1 and (2) 3,1 object is mended in first row box, full in first row box like this, be 10, in second row box, be left 2, second row box is moved to position A, and two rows are 12 altogether.As demonstrate 15-9, and second row box is placed on position A, and first row is put to 10, and second row puts 5, second row box is moved to position B from position A, and 15 are divided into 10 and 5, take out 9:10-9=1 from 10 the insides, second row box is retracted to position A from position B, and 1 and 5 is 6,1+5=6 altogether.By demonstration, the understanding that student will be very vivid has also been remembered computing method.

Claims

1. the 20 plus-minus method education demonstrators with interior number for school for deaf-mutes's mathematical education, it is characterized in that, this demonstration device comprises: the base plate made from plastics or wood materials, the surrounding of described base plate has frame, the length of base plate is 11 times of a square box length, above base plate, there is five-element's pickup groove, be used for fixing the described square box of two rows above, the described square box of two rows is 10 described square boxes in one line, and all can move left and right along described pickup groove, in the middle of square box described in first row, establish an active clapboard, described block board thickness is 1/10th of described square box, square box many 1/5th described in Length Ratio, width equates with described square box, described in second row, square box energy entirety moves forward and backward, above described square box, there is lid to open, the inside dress thing, the demonstration equipment that also has one group 20 of supporting application, demonstration equipment is pearl, small stone, table tennis, pencil or the rubber of plastics, to the requirement of described demonstration equipment be, some is to be contained in described square box, can see from above, and some is to be contained in described square box, can't see from the outside.