CN2206471Y - Four fundamental rules calculating book - Google Patents

Abstract

The utility model relates to a calculation tool used for four arithmetic operations. In the utility model, rifled paper and four piles of counting rods are respectively arranged at the inner part of the back cover and the front cover of a calculation book; multiplication pithy formula which is in a longitudinal arrangement is arranged on the counting rods which are made from plastics film; the multiplication pithy formula is represented by Arabic numerals and scientific numerals side by side. Multiplication and division are equally converted into addition and subtraction through turning calculation, and calculation is sped up for the addition and the subtraction through using the scientific numerals. The calculation tool which is simpler and cheaper than a calculator can train users' intelligence, which is favorable to learning arithmetic, and thereby, the utility model is a simple, effective, portable, and inexpensive calculation tool for adolescent students, venders, etc.

Description

Four fundamental rules calculating book

The utility model relates to a kind of computational tool that is used for arithmetic.

Arithmetic is the first step of student's learning mathematics, also be in the daily life shopping and the retailer of businessman use maximum calculating.Can be used for doing the instrument of this kind calculating, at present most widely used is counter and abacus.But these two kinds of instruments all exist weak point.Counter costs an arm and a leg, can't staff under present economic condition one, and, numerous children for learning mathematics, counter has been got rid of people's intellection too much and has been relied on electron device, be unfavorable for tap intellectual resources and help the user to grasp mathematical knowledge, thereby do not advocate in the school even forbid that the student uses the practice of counter reasonable.Though abacus is more cheap than counter, but still can not be inexpensive, its making will be spent with a large amount of high-quality timber and artificial, and volume is big, and inconvenience is carried.Ancient Times in China was once painted certainly table of multiplication mouth with bamboo chip, and multiplication and division are turned to plus-minus, can be described as and calculated.But the bamboo chip volume is big, and it is a lot of to raise sheet, and is very inconvenient, replaced by rechoning by the abacus gradually afterwards.

The purpose of this utility model is for providing a kind of new arithmetic instrument, and it is more cheap, portable than counter and abacus, helps the learner again and trains the intellect and grasp arithmetic.

For achieving the above object, the utility model is improved the instrument of calculating in ancient times, is aided with reflex paper, makes up a kind of simple and practical computational tool---and arithmetic is calculated this.

The utility model is made up of front cover and back cover, and its size is similar with employee's card, is easy to carry.The inside that it is characterized in that front cover has contingrod, and the inside of back cover has reflex paper.Contingrod is printed on the multiplication mouth above from top to bottom in order and determines in the form of sheets, and 0 to 9 each several one, ten one covers build up a pile.Four piles or how repeated contingrod are fixed on the inside of front cover side by side from top.Except that first raise for No. 0 raise with last No. 9, raise the bottom 1-8 number and be printed on the label of indicating its serial number, label is positioned at the indentation, there that top which floor contingrod stays, and still can see label under the state of stacking, thereby can once translate into needed contingrod.Have reflex paper in the inside of back cover, it is that a kind of the lid on coloured base plate write reused onionskin or plastic sheeting with metal marker.The literal that one row's expression digit is arranged above back cover the inside reflex paper can make and reduce wrong when writing numeral and can economize and write 0 and radix point.The contingrod of sheet can be made with plastic sheeting or cardboard.Calculate to accelerate the calculating degree for the science numeral of utilizing the inventor to create, the multiplication pithy formula on the contingrod can write out with arabic numeral and science numeral side by side.For fixing reflex paper, can fix two elastic braids in the back cover inside two sides, with it 2 to 3 reflex paper are fixed on the back cover the inside.Utilize the utility model, can easily promptly carry out arithmetic.Method is summarized as follows:

1, be plus-minus with calculating multiplication and division

Take advantage of: a multiplier is turned on contingrod, will copy addition on reflex paper, promptly get answer with the number of each figure place corresponding line of another multiplier.

Remove: divisor is routed up with contingrod, will can be obtained answer smaller or equal to the row of the number on the contingrod of dividend front number as quotient successively.

2, science numeral brief introduction: calculate for accelerating plus-minus, the inventor has created a kind of metric numeral expression symbol---science numeral.The science numeral has the branch of cursive script and regular script.Arabic numeral and section's grass contrast as following table:

Arabic several 0123456789 |-1 10

Section's grass

The fundamental element of science numeral is ± 1, ± 2,5,10, other numbers are all combined by fundamental element, and therefore, the complementary number of all of every 10 all can therefrom go out with the shape supply.

3, change is kept to and adds

Number is got " the few benefit ", can be by additional calculation.Getting " the few benefit " pithy formula is: tail zero is ignored, and back number is got benefit, and other benefits subtract one, the most preceding add.(pronouncing " lacking ", representative-1).

Like this, plus-minus mixes or subtracts all and can carry out in vertical at one.

If answer is the most preceding number is or negative, illustrate that answer is a negative, should get " anti-few benefit " and turn to general negative form.Getting " anti-few the benefit " pithy formula is: tail zero is ignored, and back number form is mended, and other benefits subtract one, changes to be minus sign less.

4, a plurality of single digital additions turn to take advantage of

Multiplication and division turn to plus-minus by copying to raise, and subtract by lacking to mend to turn to add.Like this, just to have changed into mainly be the addition of a plurality of single digital in arithmetic.Can utilize the features of shape of science numeral, a plurality of single digital additions be turned to simple multiplication to accelerate computing velocity with the tail method that disappears, five methods, expansion five methods etc.Here this is not elaborated.

From above-mentioned structure and feature as can be seen, the utility model is compared with abacus with counter, simple structure, low price, easy to carry, calculate also very quick effectively.And, when utilizing arithmetic to calculate this calculating, the handspring pen to write brain and think, can intellectual exercise, help the adolescents with learning arithmetic, be that counter is irreplaceable.Utilize arithmetic to calculate and originally can replace abacus to levy, can save instructional blocks of time greatly, make the student enter the study of algebraic sum coordinate ahead of time.

Fig. 1 is the structural map of the utility model the inside;

Fig. 2 is the utility model one repeated contingrod plan view image.

Now, specify the structure of present embodiment in conjunction with the following examples and accompanying drawing.

Front cover ［ 1 ］ and back cover ［ 2 ］ are an integral body, lump together from the centre by fold line ［ 3 ］ is folding.The utility model title " arithmetic is calculated this ", inventor and manufacturer's name and decoration case can be write in the front cover outside.Back cover is outer can to stamp concise and to the point operation instruction.The front cover the inside is fixed four repeated contingrods ［ 4 ］ side by side, and point of fixity ［ 5 ］ is raised so that turn over up.Every tensor calculus is raised bottom ［ 6 ］ and is printed on corresponding label, and label is imprinted on the indentation, there of upper strata contingrod, can not be blocked, thereby can " one translate into open ".Contingrod middle part ［ 7 ］ be printed on arrange from top to bottom, use the multiplication pithy formula of the science numeral of arabic numeral side by side.Ten of every repeated contingrods, the order by 0 to 9 from the upper strata to the bottom is arranged.The drawn plan view image of ten kinds of contingrods of Fig. 2.The inside two sides of back cover respectively has an elastic braid ［ 8 ］, and 2 to 3 reflex paper made from plastic sheeting ［ 9 ］ are fixed on the back cover the inside by elastic braid.Back cover the inside reflex paper top is printed on the literal ［ 10 ］ of expression digit.In the burst that the front cover back cover has a common boundary, can fix one to two little ring ［ 11 ］, be used for inserting metal marker.

Arithmetic calculate this not the time spent amount to, big or small and general employee's card is similar, and is very convenient to carry.

Claims (3)

1, a kind of arithmetic is calculated this, is made up of front cover and back cover; It is characterized in that having mark in the front cover the inside raises, and has worn reflex paper at back cover inside; Said mark is raised in the form of sheets, the multiplication pithy formula of vertically arranging is in order arranged above, and from 0 to 9 each several one, per ten build up a pile, four piles or more pile marks are raised top and are fixed on the front cover the inside side by side, and label of raising its order of sign of bottom by mark can once be routed up required mark and raise; Said reflex paper is topped in said back cover the inside, and back cover the inside reflex paper top is printed on the literal of representing digit, can calculate on reflex paper with metal marker, and reflex paper can be recycled.

2, arithmetic according to claim 1 is calculated this, it is characterized in that said contingrod prints with plastic sheeting, and this usefulness four repeated contingrods are calculated in each arithmetic, and the multiplication pithy formula on the contingrod writes out with arabic numeral and science numeral side by side.

3, arithmetic according to claim 1 and 2 is calculated this, it is characterized in that the back cover inside two sides respectively has an elastic braid, is used for 2 to 3 reflex paper are fixed on the back cover the inside; Said reflex paper is made with plastic sheeting.

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