CN207765020U - A kind of primary school mathematics plus-minus method instructional device - Google Patents
A kind of primary school mathematics plus-minus method instructional device Download PDFInfo
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- CN207765020U CN207765020U CN201721343250.0U CN201721343250U CN207765020U CN 207765020 U CN207765020 U CN 207765020U CN 201721343250 U CN201721343250 U CN 201721343250U CN 207765020 U CN207765020 U CN 207765020U
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- side wall
- turntable
- demonstration board
- plus
- block
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Abstract
The utility model discloses a kind of primary school mathematics plus-minus method instructional devices,Including bottom plate,The front side wall of the bottom plate is installed with demonstration board,Lower end is installed with demarcation strip in the front side wall of the demonstration board,And demonstration board is divided into two parts by demarcation strip,The upper part right end of the demonstration board is equidistant uniformly to offer cavity,Tens switch block is same,Second digital apparatus selects number identical with the first digital apparatus,And third digital apparatus is carrying out three-figure plus-minus after double figures plus-minus is learned skillfully,After choosing number,It is slided on slideway by the sliding block in buck-boost converter again,It is simple and convenient so arbitrarily to change number,And it is adsorbed on blackboard plus big sucker and small sucker and facilitates demonstration and teaching,The setting that each step in teaching process all clearly fills in plate plus carry can make students ' thinking road clear,Good teaching significance is played in the period of begining to learn plus-minus.
Description
Technical field
The utility model is related to instructional technology field, specially a kind of primary school mathematics plus-minus method instructional device.
Background technology
In primary school education, the mathematics arithmetic contacted earliest is addition and subtraction, this is the lex fundamentalis of all arithmetic, it is therefore desirable to
Detailed explanation, ensures understanding its meaning that student can be deep, but many pupils are when one touches mathematics addition and subtraction,
It is all easy to do the addition and subtraction within 10, the addition and subtraction for being more than 10 is just extremely easy miscalculation, therefore many math teachers are being imparted knowledge to students
In feel to have a headache, therefore teacher has to step to show clear in student's initial contact addition and subtraction, is easily understood,
And on blackboard displaying need teacher constantly set a question calculation it is very complicated.
Utility model content
The purpose of this utility model is to provide a kind of primary school mathematics plus-minus method instructional devices, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions：A kind of primary school mathematics plus-minus method instructional device,
Including bottom plate, the front side wall of the bottom plate is installed with demonstration board, and the front side wall lower end of the demonstration board is installed with point
Limiting plate, and demonstration board is divided into two parts by demarcation strip, the upper part right end of the demonstration board is equidistant uniformly to offer cavity,
And cavity shares nine, is installed with buck-boost converter below the upper part left end of the demonstration board, under the demonstration board
Partial isometry offers block of writing from uniformly, and big sucker, the bottom plate are installed at the rear wall center of the bottom plate
Rear wall four corners it is equidistant it is uniform be installed with small sucker, the upper partial lumen left side wall of the demonstration board from up to
Under be installed with the first digital apparatus, the second digital apparatus and third digital apparatus successively；
First digital apparatus includes the first turntable, and fixed on the left of the madial wall of the left side wall of the first turntable and bottom plate
Installation, the right side wall of first turntable are rotatablely equipped with first rotating shaft, and the lateral wall of the first rotating shaft is socketed with hundreds
The inner ring of switch block, first turntable is installed with the second turntable, and the madial wall of the left side wall of the second turntable and bottom plate is left
Side is fixedly mounted, and the right side wall of second turntable is rotatablely equipped with the second shaft, and the lateral wall is socketed with tens and turns
The inner ring of block, second turntable is installed with third turntable, and on the left of the madial wall of the left side wall of third turntable and bottom plate
It is fixedly mounted, the right side wall of the third turntable is rotatablely equipped with third shaft, and the lateral wall is socketed with units switch block.
Preferably, the buck-boost converter includes shell, the front side of the rear wall and demonstration board top half of the shell
Wall left end is fixedly mounted, and display cavity is offered in the middle part of the front side wall of the shell, and wall is opened at left and right sides of the inner cavity of the shell
Equipped with slideway, the madial wall of the slideway is slidably fitted with sliding block, and the right end of sliding block runs through the right side wall of shell, described in two
Sliding block up and down be distributed in shell, the left side wall of the sliding block is installed with one end of connecting rod, the sliding block described in upper end
The other end of the connecting rod of left end is installed with adder block, and the other end of the connecting rod of the sliding block left end described in upper end fixes peace
Dress is installed with subtraction block.
Preferably, the upper surface of the demarcation strip offers carry and fills in plate, and carry fills in plate and is located at demonstration board top
The front side wall bottom end divided.
Preferably, the structure all same of second digital apparatus and third digital apparatus and the first digital apparatus.
Preferably, the hundreds switch block, tens switch block are identical with the structure of units switch block, and hundreds switch block,
The lateral wall of tens switch block and units switch block zero to nine ten Arabic numerals of equidistant uniform distribution.
Preferably, the block of writing shares four.
Compared with prior art, the utility model has the beneficial effects that：The utility model first will be on demonstration board in part
Required number is arbitrarily chosen in units switch block rotation on first digital apparatus of intracavitary from zero to nine, and tens switch block is same
Sample is in this way, the second digital apparatus selects number identical with the first digital apparatus, and third digital apparatus is i.e. ripe in double figures plus-minus
Three-figure plus-minus is being carried out after practicing, after choosing number, then is being slided on slideway by the sliding block in buck-boost converter, into
And adder block or subtraction block is driven to move, two blocks can be according to requiring to slide into display cavity, and then student is allowed to calculate, this
Sample is simple and convenient can arbitrarily to change number, and is adsorbed on blackboard plus big sucker and small sucker and facilitates demonstration and teaching,
Each step in teaching process, which all clearly adds carry, which fills in the setting of plate, can make students ' thinking road clear, begin to learn plus-minus when
Phase plays good teaching significance.
Description of the drawings
Fig. 1 is the main structure diagram of the utility model；
Fig. 2 is the left view structural representation of the utility model；
Fig. 3 is the demonstration board internal structure schematic diagram of the utility model；
Fig. 4 is the structural schematic diagram of the buck-boost converter of the utility model.
In figure：1 bottom plate, 2 demonstration boards, 3 demarcation strips, 31 carries fill in plate, 4 cavitys, 5 buck-boost converters, 51 shells, 52 aobvious
Show chamber, 53 slideways, 54 sliding blocks, 55 connecting rods, 56 adder blocks, 57 subtraction blocks, 6 block of writing, 7 big suckers, 8 small suckers, 9 first numbers
Position device, 91 first turntables, 92 first rotating shafts, 93 hundreds switch blocks, 94 second turntables, 95 second shafts, 96 tens switch blocks,
97 third turntables, 98 third shafts, 99 units switch blocks, 10 second digital apparatus, 11 third digital apparatus.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 4 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of primary school mathematics plus-minus method instructional device, packet
Bottom plate 1 is included, the front side wall of the bottom plate 1 is installed with demonstration board 2, and the front side wall lower end of the demonstration board 2 is installed with
Demarcation strip 3, and demonstration board 2 is divided into two parts by demarcation strip 3, the upper part right end of the demonstration board 2 is equidistant uniformly to be opened up
There is cavity 4, and cavity 4 shares nine, and buck-boost converter 5 is installed with below the upper part left end of the demonstration board 2, it is described
The lower part of demonstration board 2 is equidistant uniformly to offer block of writing 6, is installed at the rear wall center of the bottom plate 1 big
Sucker 7, the rear wall four corners of the bottom plate 1 are equidistant to be uniformly installed with small sucker 8, the top of the demonstration board 2
Point inner cavity left side wall is installed with the first digital apparatus 9, the second digital apparatus 10 and third digital apparatus successively from top to bottom
11；
First digital apparatus 9 includes the first turntable 91, and the left side wall of the first turntable 91 and the madial wall of bottom plate 1 are left
Side is fixedly mounted, and the right side wall of first turntable 91 is rotatablely equipped with first rotating shaft 92, the lateral wall of the first rotating shaft 92
It is socketed with hundreds switch block 93, the inner ring of first turntable 91 is installed with the second turntable 94, and a left side for the second turntable 94
It is fixedly mounted on the left of side wall and the madial wall of bottom plate 1, the right side wall of second turntable 94 is rotatablely equipped with the second shaft 95, institute
The lateral wall stated is socketed with tens switch block 96, and the inner ring of second turntable 94 is installed with third turntable 97, and third
It is fixedly mounted on the left of the left side wall of turntable 97 and the madial wall of bottom plate 1, the right side wall of the third turntable 97 is rotatablely equipped with the
Three shafts 98, the lateral wall are socketed with units switch block 99, be from most basic when imparting knowledge to students to the pupil that tentatively imparts knowledge to students
Beginning, the units switch block 99 on the first digital apparatus 9 on demonstration board 2 in partial lumen is rotated from zero to nine times first
Meaning chooses required number, and tens switch block 96 is same, and the second digital apparatus 10 selects number with 9 phase of the first digital apparatus
Together, and third digital apparatus 11 i.e. double figures plus-minus learn it is skilled after carrying out three-figure plus-minus, after choosing number, then
It is slided on slideway 53 by the sliding block 54 in buck-boost converter 5, and then adder block 56 or subtraction block 57 is driven to move, two
Block can be according to requiring to slide into display cavity 52, and then student is allowed to calculate, simple and convenient so arbitrarily to change number, and
In addition big sucker 7 and small sucker 8 are adsorbed on blackboard and facilitate demonstration and teaching, each step in teaching process all clearly adds
The setting that carry fills in plate 31 can make students ' thinking road clear, and good teaching significance is played in the period of begining to learn plus-minus.
Specifically, very simple and convenient so preferably convert addition and subtraction, the buck-boost converter 5
Including shell 51, the rear wall of the shell 51 is fixedly mounted with the front side wall left end of 2 top half of demonstration board, the shell 51
Front side wall in the middle part of offer display cavity 52, wall offers slideway 53, the slideway at left and right sides of the inner cavity of the shell 51
53 madial wall is slidably fitted with sliding block 54, and the right end of sliding block 54 runs through the right side wall of shell 51, the sliding block 54 described in two
It is distributed in shell 51 up and down, the left side wall of the sliding block 54 is installed with one end of connecting rod 55, the sliding block described in upper end
The other end of the connecting rod 55 of 54 left ends is installed with adder block 56, the connecting rod 55 of 54 left end of sliding block described in upper end it is another
One end is installed with subtraction block 57.
Specifically, in order to which the teaching being more clear makes very clear, the upper surface of the demarcation strip 3 offers carry and fills out
Plate 31 is write, and carry fills in the front side wall bottom end that plate 31 is located at part on demonstration board 2.
Specifically, the adjusting that can be added and subtracted in this way to three numbers, second digital apparatus 10 and third numerical digit dress
Set 11 and first digital apparatus 9 structure all same.
Specifically, the number for needing to add and subtract can be adjusted manually in this way, the hundreds switch block 93, tens turn
Block 96 is identical with the structure of units switch block 99, and the outside of hundreds switch block 93, tens switch block 96 and units switch block 99
Wall zero to nine ten Arabic numerals of equidistant uniform distribution.
Specifically, pupil's ability of primary learning mathematics is limited, wanted so the plus-minus of three numbers can meet
It asks, and three digits add up most namely four figures, so block of writing 6 four is enough, the block of writing 6 shares
Four.
Operation principle：, be since most basic when imparting knowledge to students to the pupil tentatively to impart knowledge to students, it first will be on demonstration board 2
Units switch block 99 on the first digital apparatus 9 in partial lumen is rotated arbitrarily chooses required number from zero to nine, and ten
Digit switch block 96 is same, and the second digital apparatus 10 selects number identical with the first digital apparatus 9, and third digital apparatus 11 is
Three-figure plus-minus is being carried out after double figures plus-minus is learned skillfully, after choosing number, then is passing through the cunning in buck-boost converter 5
Block 54 slides on slideway 53, and then adder block 56 or subtraction block 57 is driven to move, and two blocks can be according to requiring to slide into
In display cavity 52, and then student is allowed to calculate, it is simple and convenient so arbitrarily to change number, and add big sucker 7 and small sucker 8
It is adsorbed on blackboard and facilitates demonstration and teaching, the setting that each step in teaching process all clearly fills in plate 31 plus carry can
So that student's clear thinking, plays good teaching significance in the period of begining to learn plus-minus.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of primary school mathematics plus-minus method instructional device, including bottom plate (1), it is characterised in that：The front side wall of the bottom plate (1) is solid
Dingan County is equipped with demonstration board (2), and the front side wall lower end of the demonstration board (2) is installed with demarcation strip (3), and demarcation strip (3) will
Demonstration board (2) is divided into two parts, and the upper part right end of the demonstration board (2) is equidistant uniformly to offer cavity (4), and cavity
(4) nine are shared, buck-boost converter (5), the demonstration board are installed with below the upper part left end of the demonstration board (2)
(2) lower part is equidistant uniformly to offer block of writing (6), is installed at the rear wall center of the bottom plate (1) big
Sucker (7), the rear wall four corners of the bottom plate (1) are equidistant to be uniformly installed with small sucker (8), the demonstration board
(2) upper partial lumen left side wall be installed with successively from top to bottom the first digital apparatus (9), the second digital apparatus (10) and
Third digital apparatus (11)；
First digital apparatus (9) includes the first turntable (91), and the inner cavity of the left side wall of the first turntable (91) and bottom plate (1)
Left side wall is fixedly mounted, and the right side wall of first turntable (91) is rotatablely equipped with first rotating shaft (92), the first rotating shaft
(92) lateral wall is socketed with hundreds switch block (93), and the inner ring of first turntable (91) is installed with the second turntable
(94), it and on the left of the left side wall of the second turntable (94) and the madial wall of bottom plate (1) is fixedly mounted, the right side of second turntable (94)
Side wall is rotatablely equipped with the second shaft (95), and the lateral wall is socketed with tens switch block (96), second turntable (94)
Inner ring be installed with third turntable (97), and the left side wall of third turntable (97) with it is fixed on the left of the madial wall of bottom plate (1)
Installation, the right side wall of the third turntable (97) are rotatablely equipped with third shaft (98), and the lateral wall is socketed with units
Switch block (99).
2. a kind of primary school mathematics plus-minus method instructional device according to claim 1, it is characterised in that：The buck-boost converter
(5) include shell (51), the rear wall of the shell (51) is fixedly mounted with the front side wall left end of demonstration board (2) top half,
Display cavity (52) is offered in the middle part of the front side wall of the shell (51), wall offers at left and right sides of the inner cavity of the shell (51)
Slideway (53), the madial wall of the slideway (53) is slidably installed, and there are two sliding blocks (54), and the right end of sliding block (54) runs through shell
(51) right side wall, the sliding block (54) described in two are distributed in shell (51) up and down, and the left side wall of the sliding block (54) is fixed
One end of connecting rod (55) is installed, the other end of the connecting rod (55) of sliding block (54) left end described in upper end, which is installed with, to be added
The other end of method block (56), the connecting rod (55) of sliding block (54) left end described in upper end is installed with subtraction block
(57)。
3. a kind of primary school mathematics plus-minus method instructional device according to claim 1, it is characterised in that：The demarcation strip (3)
Upper surface offer carry and fill in plate (31), and carry fills in the front side wall bottom end that plate (31) is located at part on demonstration board (2).
4. a kind of primary school mathematics plus-minus method instructional device according to claim 1, it is characterised in that：The second numerical digit dress
Set the structure all same of (10) and third digital apparatus (11) and the first digital apparatus (9).
5. a kind of primary school mathematics plus-minus method instructional device according to claim 1, it is characterised in that：The hundreds switch block
(93), tens switch block (96) is identical with the structure of units switch block (99), and hundreds switch block (93), tens switch block (96)
With lateral wall zero to nine ten Arabic numerals of equidistant uniform distribution of units switch block (99).
6. a kind of primary school mathematics plus-minus method instructional device according to claim 1, it is characterised in that：The block of writing (6)
Share four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343250.0U CN207765020U (en) | 2017-10-18 | 2017-10-18 | A kind of primary school mathematics plus-minus method instructional device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343250.0U CN207765020U (en) | 2017-10-18 | 2017-10-18 | A kind of primary school mathematics plus-minus method instructional device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207765020U true CN207765020U (en) | 2018-08-24 |
Family
ID=63178767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721343250.0U Expired - Fee Related CN207765020U (en) | 2017-10-18 | 2017-10-18 | A kind of primary school mathematics plus-minus method instructional device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207765020U (en) |
-
2017
- 2017-10-18 CN CN201721343250.0U patent/CN207765020U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180824 Termination date: 20201018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |