ES2119671A1 - Calculator for teaching addition and subtraction - Google Patents

Calculator for teaching addition and subtraction

Info

Publication number
ES2119671A1
ES2119671A1 ES09600074A ES9600074A ES2119671A1 ES 2119671 A1 ES2119671 A1 ES 2119671A1 ES 09600074 A ES09600074 A ES 09600074A ES 9600074 A ES9600074 A ES 9600074A ES 2119671 A1 ES2119671 A1 ES 2119671A1
Authority
ES
Spain
Prior art keywords
calculator
subtraction
base
elements
teaching
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.)
Granted
Application number
ES09600074A
Other languages
Spanish (es)
Other versions
ES2119671B1 (en
Inventor
Conde Ambrosio Borrajo
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
Priority to ES9600074A priority Critical patent/ES2119671B1/en
Publication of ES2119671A1 publication Critical patent/ES2119671A1/en
Application granted granted Critical
Publication of ES2119671B1 publication Critical patent/ES2119671B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Toys (AREA)

Abstract

It consists of a base with two rods which are identical in size and section, and which are parallel to each other and perpendicular to said base, and twenty centre- perforated threadable elements (beads), a maximum of ten of which can be slipped onto each rod. Every five elements have a different colour from the remaining groups. This calculator applies to the field of teaching arithmetic (calculation, calculus) at infant and primary education and special education level.
ES9600074A 1996-01-05 1996-01-05 PEDAGOGICAL CALCULATOR FOR THE SUM AND THE SUBTRACT. Expired - Lifetime ES2119671B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES9600074A ES2119671B1 (en) 1996-01-05 1996-01-05 PEDAGOGICAL CALCULATOR FOR THE SUM AND THE SUBTRACT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9600074A ES2119671B1 (en) 1996-01-05 1996-01-05 PEDAGOGICAL CALCULATOR FOR THE SUM AND THE SUBTRACT.

Publications (2)

Publication Number Publication Date
ES2119671A1 true ES2119671A1 (en) 1998-10-01
ES2119671B1 ES2119671B1 (en) 1999-05-16

Family

ID=8293403

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9600074A Expired - Lifetime ES2119671B1 (en) 1996-01-05 1996-01-05 PEDAGOGICAL CALCULATOR FOR THE SUM AND THE SUBTRACT.

Country Status (1)

Country Link
ES (1) ES2119671B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1475487A (en) * 1922-09-12 1923-11-27 Robert J Hammond Adjustable clamp for rubber pipes and the like
AU638646A (en) * 1946-09-04 1947-09-04 Commonwealth Scientific And Industrial Research Organization Improved radio distance measuring device and time interval measuring means
US3731401A (en) * 1971-05-21 1973-05-08 T Kojima Abacus instruction device
GB2111268A (en) * 1981-09-11 1983-06-29 Dennis Richard Quilter Abacus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1475487A (en) * 1922-09-12 1923-11-27 Robert J Hammond Adjustable clamp for rubber pipes and the like
AU638646A (en) * 1946-09-04 1947-09-04 Commonwealth Scientific And Industrial Research Organization Improved radio distance measuring device and time interval measuring means
US3731401A (en) * 1971-05-21 1973-05-08 T Kojima Abacus instruction device
GB2111268A (en) * 1981-09-11 1983-06-29 Dennis Richard Quilter Abacus

Also Published As

Publication number Publication date
ES2119671B1 (en) 1999-05-16

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