CN2041054U

CN2041054U - "1+1" calculating rule

Info

Publication number: CN2041054U
Application number: CN 88207624
Authority: CN
Inventors: 黄俊民; 黄红坚; 黄红辉; 黄红升
Original assignee: Yang Bifeng
Current assignee: Yang Bifeng
Priority date: 1988-06-21
Filing date: 1988-06-21
Publication date: 1989-07-12

Abstract

The utility model provides a '1+1' calculating ruler which not only can be used as an ordinary measuring ruler, but also can display special numbers, prime numbers and composite numbers in integers and can carry out operation. The calculating ruler is composed of a fixed ruler and a slide ruler which have opposite directions and scales, wherein, the fixed ruler and the slide ruler have the same length, the same marking method and symmetrical positions, and the calculation is carried out by making use of different scales on equant rulers and the prime numbers, the composite numbers and the special numbers which are represented by representing methods. The calculating ruler not only can develop the mathematical intelligence of students of primary and middle schools, but also can help people research the Goldbach conjecture of the difficult problem of the world mathematics.

Description

"1+1" calculating rule

The utility model relates to a kind of calculating, counting instrument, especially a kind of " 1+1 " slipstick that can represent prime number, close number and special number.

The existing common meter that uses is confined to the use of tolerance aspect, and with office such as rice, centimetre, millimeter tolerance length, slipstick then lays particular emphasis on complicated constant calculations, can not make tolerance and use.

The purpose of this utility model provides and a kind ofly can not only make common gage and use, and can show special number, the prime number in the integer and close number, and can carry out the slipstick of computing.

" 1+1 " of the present utility model slipstick, be made up of two opposite graduated scale and slide rules of direction, its length is the same, and the mark method is the same, the position symmetry is utilized prime number that scales different on Equant ruler and method for expressing show, is closed number and special number calculates.

Below in conjunction with accompanying drawing this slipstick is described further.

Fig. 1 is the front schematic view of this " 1+1 " slipstick.

This " 1+1 " slide ruler is made up of a scale and a slide rule. Upper chi claims slide rule, scale below chi, the weighed chi of lower chi, scale is above chi. The length of two rulers is the same, and evenly divided is the same, and the mark method is the same, is opposite direction, and the scale of slide rule is marked from left to right by 0 beginning, and the scale of scale is by 0 beginning, the mark of turning left from the right side. Scale is with 1 millimeter or 1 centimetre of office's length, and the long dotted line of special several 0 usefulness represents that special several 1 usefulness short dash lines represent, prime number represents that with single-point the coupling number represents with short-term, meets the long line of 10 usefulness to represent, very close number and represent with two point, meet 0 and 10 numeral at long line marked. Scale also other the method for expressing such as available different colours represents. During use, two rulers are used altogether. This chi can use the materials such as plastics, wood, bamboo, metal, hardboard to make.

" 1+1 " slide ruler itself is a symmetrical table of primes, be ask prime number, ask symmetrical prime number and coupling number symmetry two prime numbers and effective tool. It uses except making standard rule, also can help students in middle and primary schools to be familiar with which is special number, those are prime numbers and close number that exploitation students in middle and primary schools' mathematics intelligence helps to solve world difficult math question Goldbach's Conjecture.

Using method:

1. ask prime number: the integer that single-point marks is a prime number.The integer 2,3,5,7,11 that for example single-point marks on chi ... it all is prime number.

2. ask symmetrical prime number: the arbitrary integer n greater than 4 has symmetrical prime number.

Example:

Symmetry prime number center number symmetry prime number

3 4 5

3，5 8 11，13

3，7 10 13，17

3. ask any coupling number symmetry two prime numbers and

Ask method: along the scale translation, 2n is counted in the coupling that makes 0 of slide rule aim at scale with slide rule, and all on slide rule and scale two relative numbers of single-point are arranged all is prime number, this two prime number with equal coupling and count 2n.

For example: seek a spouse close several 98 two prime numbers and.Make 0 of slide rule aim at 98 of scale, on slide rule, have the relative scale single-point of single-point two prime numbers and be equal to 98.

The prime number of the prime number+scale of slide rule=and

19 79 98

31 67 98

37 61 98

Claims

1, " 1+1 " slipstick of usefulness can be calculated, be counted to a kind of mensurable length again, form by graduated scale and slide rule, it is characterized in that: need two ruler length of use simultaneously the same, evenly divided is the same, the mark method is the same, direction is opposite, and scale is represented is special number, prime number, close number and length.

2, slipstick as claimed in claim 1 is characterized in that the scope of number of division, and the student is between 0～1000 with chi, is between 0～330000000 for research number theory chi, and the mark method is with millimeter, centimetre office.