GB2257814A

GB2257814A - Teaching arithmetic

Info

Publication number: GB2257814A
Application number: GB9115613A
Authority: GB
Inventors: Yeh Kant
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-19
Filing date: 1991-07-19
Publication date: 1993-01-20
Anticipated expiration: 2011-07-19
Also published as: GB2257814B; GB9115613D0

Abstract

Seven stacks of cards are mounted side-by-side in a common binding between covers 1 and 2, stacks 5, 3, 3, 5 bearing numerals and alternate stacks 4 bearing arithmetical operation symbols, e.g. for addition, subtraction, multiplication, division, greater than, less than etc. The same indicia may be borne by both sides of a card but at different positions/ orientations. Cards in stacks 4 are thicker than the other cards. By suitably turning over cards in the various stacks, chosen equalities or inequalities can be represented. <IMAGE>

Description

A universal card set for calculation of addition, subtraction, multiplication and division Background of the Invention A conventional calculation card is divided into a left, middle, right first and right second four rows, wherein the middle row records calculated numerals, and the right first row records an integral portion of the result and the right second row records a decimal portion of the result, while the adjacent sides of the left and middle rows are respectively formed with square sindows through which the changeable calculation symbols located on the bottom can be seen.

Moreover, a self-adhesive fabric band is affixed on the bottom for restricting a part of the cards from being used.

Although such calculation card can eliminate the problem of searching scattered cards and save the time for clearing up the cards, however, such card set can only provide the numerals of 0-100, and can only provide calculation of addition, subtraction, multiplication and division. As to the numeral with fraction and decimal, such calculation card can not show the calculation thereof. Therefore, the function provided by conventional calaculation card is insufficient. Furthermore, due to the restriction of the unit place, the calculated muneral, calculating numeral and result numeral are restricted, esPeciallY the calc- ulating meral.

Summary of the Invention It is therefore a primary object of this invention to provide a universal calculation card set which is diveded into seven groups of cards wherein three groups are of the same pattern and record the same symbol and the other four groups are of the same pattern and record the same symbol and the other four groups are of the same pattern and record the same numeral. The symbol card groups are interpositioned between the numeral card groups in the following pattern: muneral-symbol-numeral-symbol-numeral-symbol-muneral.

According to this arrangement, the numeral cards can compose a numeral cards can compose a number larger than 100 to increase the calculation range.

The Present invention can be better understood through the following description and accompanying drawings wherein: Brief Description of the Drawings Fig. 1 is a perspective strutural view of this invent ion; Fig. 2 is a view in which card group is opened to show the positions and tYPes of recorded symbols and numerals on the front and back faces of the crds; Fig. 3 shows the illustration of 8 8 + 7 7 = 1 6 5 Fig. 4 shows the illustration of 1 4 4 - 1 0 0 = ; Fig. 5 shows the illustration of 1 2 x 2 0 = 2 4 0 Fig. 6 shows the illustration of 1 2 8:8 = 1 6 Fig. 7 shows the number 1,9 8 0 2 0 2 7 3 " which has a decimal port ion:: Fig. 8 shows a transverse type of relationship "8/ 1 3 5/ 1 2 ; and Fig. 9 shows a longitudinal type of equation 1 5 / 4 5 = 1 / 3 Detailed Description of the Preferred Embodiment Please refer to Fig. 1. The present invention includes a cover sheet 1, a bottom sheet 2 and multiple cards disposed therebetween. The cardsare divided into seven groups, sherein three groups are calculation symbol cards 4 recording calculation symbols and four groups are calculation symbol cards 4 recording calculation symbols and four groups ard numeral cards 3,5 recording numerals. These cards are all oblong and on one side thereof are formed at least three binding holes.The seven groups of cards are arranged in such a manner that the symbol cards 4 are interpositioned between the numeral cards 3,5 i. e, numeral card 5-symbol card 4- numeral card 3-symbol card 4-numeral card 3-symbol card 4-numeral card 5. The thickness of the symbol card is different from that of the num- era] card. The proportion is about 10:1.

Please now refer to Fig. 2. Fach card group is opened for several pages to show the position and type of recorded symbols and numerals. In the numeral card group, the first card is blank, the second is a "?" symbol, and the rest re cord "0,1, 9" and "00, 01, 100" in sequence. The total page number is 113. The front face but the back one is 90 rotated relatively to the front one. At the right low corners of the front and back faces are recorded trhe same numeral with small size for easy searching. Moreover, in the numeral card groups 3,5, the right and left two numeral card groups 3,5 are a set and the numerals recorded thereon are adjacent to the middle symbol card 4 disposed therebetween.

In the symbol card group, the first one is blank and the rest record "+ , ,x ,. , < , > ,=,.,/" in sequence. The total card number is 10. The back face records the smae symbol but the back symbol is rotated 90 relatively to the front symbol.

The symbols "+ , - , X , + " are recorded at left positions while the wymbols < , > ,=" are recorded at central position and the symbol "/" which is recorded on the back face is in a horizontal pattern (on the basis of the numeral) . Also, at the right low corners of the front and back faces are recorded the same symbol with small size for easy searching.

Please now refer to Fig. 3 which shows 88+77=165, wherein the result number "1B5" is formed by two numeral cards.

The right symbol card is forst turned over td the blank page and the unit numeral and temfold numeral are shown by the rightmost numeral card. The hundredfold numeral is shown by another numeral card. Fig. 4 shows 144-100=44, wherein the calculated number is shown by the left two numeral cards.

Similarly, in multiplication and division, when three figure number appears, two numeral cards will be used to show the number, as shown in Figs. 5 and 6.

Please further refer to Fig. 7 which shows "9802.0273" ,wherein a number with decimal protion is illustrated for the pupils to know the decimal and the calculation thereof.

Please now refer to Fig. 8 which shows 8/13 > 5/12, wherein the symbol "/" can express a transverse type of fract ion and the symbols " > " and < " " can indicate the relation- ship between fractions.

Referring now to Fig. 9 which shows 15/45=1/3, wherein the upper half thereof (the back face of the cards) can express a longitudinal type of fraction and the symbol "=" is used for the pupils to know the fractions with different numerators and denominators but the same ratio.

The present invention can be variously embodied with many functions as follows: 1. For the pupils to know the calculation of numbers formed by numerals "0,1....... 9" 2. Addition.

3. Subtraciton.

4. Continuous addition.

5. Continuous subtraction.

G. Alternate addition and substraction.

7. Multiplication.

8. Division.

9. Continuous multiplication or division.

10. Alternate addition and substraciton.

11. Calculation and expression of number with decimal.

12. Comparison between values of numbers.

13. Expression of longitudinal and transverse types of fr actions.

Such arrangement can train pupils in logic thinking and brain using so as to enhance their calculation ability.

Claims

What is claimed is:

1. A universal card set for calculation of addition, subtr- action, multiplication and division, comprising seven groups of cards, wherein three groups are oblong calcul ation symbol cards and four groups are oblong numeral cards, said symbol card recording calculation symbols on its front and back faces and said numeral cards reco- rding numerals on its front and back faces, on one side of said symbol and numeral cards being formed at least three binding holes, at right lower corners of each said card being recorded the same symbol or numeral with small size for easy searching, said seven card groups being arranged in such a manner that said symbol card groups are interpositioned between said numeral card groups, the thickness of said symbol card being different from that of said numeral card and the proportion being about 10:1.

2. A universal card set as claimed in claimed in claim 1, wherein the numeral or symbol recorded on the back face of said numeral or symbol card is 90 rotated relatively to that recorded on the front face thereof.

3. A universal card set as claimed in claim 1, wherein the symbols " + , - , X , -: " recorded on the back face of said symbol card are adjacent to said binding holes and the symbols " > , < , =" are recorded at the central position.

4. A universal card set as claimed in claim 1, wherein the symbol "/" is recorded on the front face of a symbol card while on the back face of said symbol card is recorded a symbol " ~ "

5. h universal card set as claimed in claim 1, wherein the numerals recorded on the left and right numeral card gr oups are adjacent to the same symbol card.