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Manufacturing and using method for disc calculator

A manufacturing method and technology of a calculator are applied in the field of teaching aids, which can solve the problems that teaching aids are not intuitive, difficult to remember, and inconvenient to master, etc., and achieve the effects of saving pen, ink and paper resources, improving the ability of addition and subtraction, and reducing the burden of learning.

Active Publication Date: 2014-05-14
肖学田
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The teaching aids are not intuitive enough, and the abstract numbers make it easy for children to be tired of learning, resist, and even feel disgusted, and the calculations are time-consuming and labor-intensive, and a lot of pen, ink and paper are wasted
For young children, abacus calculation is difficult to understand, hard to remember, inconvenient to master, and the efficiency of mental calculation is low

Method used

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  • Manufacturing and using method for disc calculator
  • Manufacturing and using method for disc calculator

Examples

Experimental program
Comparison scheme
Effect test

example 4

[0059] Example 4: 200×115=23000

[0060] 200×115=200×100+200×10+200+200+200+200+200=20000+2000+200+200+200+200+

[0061] 200=23000

[0062] Why is it required to multiply by 100 and by 10? Because multiplication by 100 and multiplication by 10 does not need to be calculated, as long as 0 is added after the original multiplicand, multiplication by 100 adds two 0s, and multiplication by 10 adds a 0.

[0063] Multiplication calculation formula: multiplication calculation is very convenient, it is changed to addition and then calculation, the three-digit multiplier is first multiplied by hundreds, and the two-digit multiplier is multiplied by 10, how many times each digit is added, and the sum is the product.

[0064] Note: The three-digit multiplier is first multiplied by hundreds, and then the two-digit multiplier is multiplied by 10, both refer to the multiplicand × 100 and the multiplicand × 10.

[0065] E. How to use division calculation: change division to subtraction ca...

example 6

[0071] Example 6: 450÷25=18

[0072] Rewrite it as addition and subtraction (450-25×10+25+25)-25×10 quotient is 10+10-2=18. This method adds enough integers to the difference, and then subtracts the number of additions. It can only be used after proficiency .

[0073] F. Addition and subtraction involving decimals; when adding and subtracting decimals, expand the decimals into integers for calculation, and then reduce the calculation result by the same multiple, and its value remains unchanged.

[0074] Example 7: 1.5+2.55—3.2=0.85, when calculating, expand the question by 100 times to become 150+255—320=85; 85÷100=0.85; 85 is reduced to the same multiple by 100 times and the original answer remains unchanged.

[0075] G. How to use segmented calculations: When a group of values ​​in a calculation question exceeds the range, it is necessary to use the segmented calculation method to calculate, and the calculation results and answers remain the same. When the segmented values...

example 8

[0076] Example 8: 35874219542×3+3842678×4-151689÷50563=107638027691

[0077] In the first step, the problem is changed to addition and subtraction calculation:

[0078] 35874219542+35874219542+35874219542+3842678+3842678+

[0079] 3842678+3842678-151689÷50563

[0080] The second step is to calculate the division first 151689÷50563=3

[0081] Change to subtraction calculation 151689-50563-50563-50563=0

[0082] Calculate 3 digits in each segment by segment, 151000-50000-50000-50000=1000+689=1689

[0083] Note that the ending number 000 represents the last three digits

[0084] 1689-563-563-563=0 This question is subtracted three times so the quotient is 3.

[0085] In particular, subtract several times for the first paragraph and subtract several times for the remaining paragraphs. Before calculation, do a mental calculation to prevent the remainder from exceeding or equal to the divisor.

[0086] The third step is to use the segment number to calculate segment by segment...

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Abstract

The invention discloses a manufacturing and using method for a disc calculator. The disc calculator is mainly made of non-toxic material paper or non-toxic chemical polyethylene or non-toxic metal aluminum or iron or copper or artificial panels. The disc calculator is characterized by being composed of a fixed disk, a rotating disk, a bolt and a nut, the fixed disk and the rotating disk are provided with the same radial equally-divided scales, each radial scale represents one number, and the fixed disk and the rotating disk are installed on the bolt and fixed with the nut and the bolt; during calculation, addition, subtraction, multiplication and division calculation can be carried out on the trajectory distance generated by movement. The disc calculator has the advantages of being visual, easy to manufacture and convenient to operate and master. Due to the fact that vertical written calculation is omitted, a large amount of writing and paper are saved, and difficulty of baby learning is relieved; the disc calculator is mainly used for achieving the teaching aims of baby number recognition and addition and subtraction calculation, can rapidly improve the capacity of the baby for recognizing numbers and conducting the addition and subtraction calculation, and is suitable for universal education for baby mathematics by the whole people.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a manufacturing method and a using method of a roulette calculator. Background technique [0002] At present, the existing children's teaching tools are only traditional pen calculations, abacus calculations and the like. The teaching aids are not intuitive enough, and the abstract numbers make children easily tired of learning, resisting, and even disgusted. For young children, abacus calculation is difficult to understand, difficult to remember, inconvenient to master, and the efficiency of mental calculation is low. Contents of the invention [0003] The object of the present invention is to provide a method for manufacturing and using a roulette calculator, which has an intuitive image, is simple to manufacture, is convenient to operate, and is easy to grasp. Omitting vertical pen calculation saves a lot of pen, ink and paper, and eases the difficulty of learning for young children. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B19/02
Inventor 肖学田
Owner 肖学田
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