DE2643649B2 - Elektronischer Kleinrechner zum Addieren und Subtrahieren zweier ganzer Zahlen - Google Patents

Elektronischer Kleinrechner zum Addieren und Subtrahieren zweier ganzer Zahlen

Info

Publication number
DE2643649B2
DE2643649B2 DE2643649A DE2643649A DE2643649B2 DE 2643649 B2 DE2643649 B2 DE 2643649B2 DE 2643649 A DE2643649 A DE 2643649A DE 2643649 A DE2643649 A DE 2643649A DE 2643649 B2 DE2643649 B2 DE 2643649B2
Authority
DE
Germany
Prior art keywords
display
keys
elements
row
computer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE2643649A
Other languages
German (de)
English (en)
Other versions
DE2643649A1 (de
Inventor
Robert Bay Harbor Islands Fla. Genin (V.St.A.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of DE2643649A1 publication Critical patent/DE2643649A1/de
Publication of DE2643649B2 publication Critical patent/DE2643649B2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/02—Counting; Calculating
    • G09B19/025—Counting; Calculating with electrically operated apparatus or devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
    • G06F15/0225—User interface arrangements, e.g. keyboard, display; Interfaces to other computer systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Human Computer Interaction (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Calculators And Similar Devices (AREA)
  • Electrically Operated Instructional Devices (AREA)
DE2643649A 1976-01-29 1976-09-28 Elektronischer Kleinrechner zum Addieren und Subtrahieren zweier ganzer Zahlen Withdrawn DE2643649B2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/653,606 US4016411A (en) 1976-01-29 1976-01-29 Mini electronic calculator with blackboard display format

Publications (2)

Publication Number Publication Date
DE2643649A1 DE2643649A1 (de) 1977-08-04
DE2643649B2 true DE2643649B2 (de) 1979-12-20

Family

ID=24621583

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2643649A Withdrawn DE2643649B2 (de) 1976-01-29 1976-09-28 Elektronischer Kleinrechner zum Addieren und Subtrahieren zweier ganzer Zahlen

Country Status (14)

Country Link
US (1) US4016411A (enExample)
JP (1) JPS5293246A (enExample)
AU (1) AU506350B2 (enExample)
BE (1) BE850313A (enExample)
CA (1) CA1063345A (enExample)
CH (1) CH604274A5 (enExample)
DE (1) DE2643649B2 (enExample)
DK (1) DK503276A (enExample)
FR (1) FR2339913A1 (enExample)
GB (1) GB1574251A (enExample)
IE (1) IE44412B1 (enExample)
IT (1) IT1083450B (enExample)
LU (1) LU76387A1 (enExample)
NL (1) NL7613034A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746286A1 (de) * 1976-10-15 1978-04-20 Sharp Kk Elektronenrechner

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225932A (en) * 1976-01-20 1980-09-30 Canon Kabushiki Kaisha Instructional calculator
US4217656A (en) * 1976-07-12 1980-08-12 Canon Kabushiki Kaisha Electronic calculator
US4138734A (en) * 1976-10-01 1979-02-06 Canon Kabushiki Kaisha Electronic equipment capable of arithmetic operations
US4117607A (en) * 1977-04-11 1978-10-03 Gary Gill Mathematics teaching system
JPS5459857A (en) * 1977-10-20 1979-05-14 Sharp Corp Eletronic calculation training machine
US4344147A (en) * 1978-11-10 1982-08-10 Canon Kabushiki Kaisha Electronic calculator with printer
US4386412A (en) * 1979-12-17 1983-05-31 Casio Computer Company, Ltd. Calculator with equation display device
US5567908A (en) * 1980-04-25 1996-10-22 The United Of America As Represented By The Secretary Of The Navy Advanced anti ship penetrator warhead
US5675827A (en) * 1981-05-21 1997-10-07 Canon Kabushiki Kaisha Information processing system, a processor, and an information processing method for the performing of an arithmetic operation of numeric information
USD273594S (en) 1981-11-13 1984-04-24 Mattel, Inc. Electronic teaching and entertainment housing or similar article
JPS58213369A (ja) * 1982-06-05 1983-12-12 Casio Comput Co Ltd 検算機能付小型電子式計算機
AU1986783A (en) * 1982-10-04 1984-04-12 Mitsubishi Denki Kabushiki Kaisha Arithmetic teaching device
JPS59151330U (ja) * 1983-02-18 1984-10-09 カシオ計算機株式会社 小型電子式計算機
US4667299A (en) * 1983-04-12 1987-05-19 Microoffice Systems Technology Portable computer
GB8807647D0 (en) * 1988-03-31 1988-05-05 Univ Open Computational devices
WO1990011566A1 (de) * 1989-03-23 1990-10-04 Hauser Walter A Verfahren und vorrichtungen zur durchführung arithmetischer operationen im sinne und mit der funktion einer elektronischen rechenmaschine
US5583802A (en) * 1989-03-23 1996-12-10 Hauser; Walter Methods and devices for performing arithmetic operations in the manner and with the function of an electronic calculating machine
JP2910114B2 (ja) * 1990-01-20 1999-06-23 ソニー株式会社 電子機器
US6142784A (en) * 1998-06-15 2000-11-07 Knowledge Kids Enterprises, Inc. Mathematical learning game and method
US20090155752A1 (en) * 2002-02-26 2009-06-18 Charles Pillsbury Resor Non-right justification display system and method for displaying arithmetic equations
US20030180699A1 (en) * 2002-02-26 2003-09-25 Resor Charles P. Electronic learning aid for teaching arithmetic skills
US20040115602A1 (en) * 2002-12-13 2004-06-17 Zouhua Ding IntelligentNet (iNet)
CN101128810A (zh) * 2005-02-24 2008-02-20 伯恩德·W·克洛克纳 用于金融数学计算例程的袖珍计算机
US8708703B2 (en) * 2005-08-15 2014-04-29 Matthew Earl Fluster Method and apparatus for teaching mathematics
US8371858B2 (en) * 2006-03-14 2013-02-12 Apolonia Vanova Method and electronic calculating device for teaching arithmetic
GB2477731A (en) * 2010-02-10 2011-08-17 Peter Derek Williams Calculator key layout for learning mathematics
US10559224B2 (en) 2016-04-21 2020-02-11 Chris Steven Ternoey Digit card calculator
US10191886B2 (en) 2016-04-21 2019-01-29 Chris Steven Ternoey Gesture controlled calculator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012628B1 (enExample) * 1969-04-22 1975-05-13
US3699667A (en) * 1971-04-12 1972-10-24 Peter Devera Gomez Arithmetic teaching apparatus
US3787988A (en) * 1971-12-30 1974-01-29 Asahi Optical Co Ltd Method and electronic machine for teaching arithmetic computation
US3863060A (en) * 1972-10-30 1975-01-28 Hewlett Packard Co General purpose calculator with capability for performing interdisciplinary business calculations
JPS5017827A (enExample) * 1973-06-18 1975-02-25
US3925909A (en) * 1973-07-24 1975-12-16 Ernest R Duncan Teaching machine
US3854226A (en) * 1973-08-20 1974-12-17 D Divine Electronically operated machine for teaching mathematics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746286A1 (de) * 1976-10-15 1978-04-20 Sharp Kk Elektronenrechner

Also Published As

Publication number Publication date
IT1083450B (it) 1985-05-21
DK503276A (da) 1977-07-30
IE44412L (en) 1977-07-29
CA1063345A (en) 1979-10-02
BE850313A (fr) 1977-05-02
FR2339913A1 (fr) 1977-08-26
NL7613034A (nl) 1977-08-02
JPS5293246A (en) 1977-08-05
DE2643649A1 (de) 1977-08-04
AU1992976A (en) 1978-06-01
GB1574251A (en) 1980-09-03
IE44412B1 (en) 1981-11-18
CH604274A5 (enExample) 1978-08-31
LU76387A1 (enExample) 1977-06-10
AU506350B2 (en) 1979-12-20
US4016411A (en) 1977-04-05

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Legal Events

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OD Request for examination
BHJ Nonpayment of the annual fee