DK41290C - Apparatus for Practicing Addition and Subtraction for Children. - Google Patents

Apparatus for Practicing Addition and Subtraction for Children.

Info

Publication number
DK41290C
DK41290C DK41290DA DK41290C DK 41290 C DK41290 C DK 41290C DK 41290D A DK41290D A DK 41290DA DK 41290 C DK41290 C DK 41290C
Authority
DK
Denmark
Prior art keywords
subtraction
practicing
children
addition
practicing addition
Prior art date
Application number
Other languages
Danish (da)
Original Assignee
Laerer Ved Det Kgl Doevstummei
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 Laerer Ved Det Kgl Doevstummei filed Critical Laerer Ved Det Kgl Doevstummei
Application granted granted Critical
Publication of DK41290C publication Critical patent/DK41290C/en

Links

DK41290D 1929-01-12 1929-01-12 Apparatus for Practicing Addition and Subtraction for Children. DK41290C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK41290T 1929-01-12

Publications (1)

Publication Number Publication Date
DK41290C true DK41290C (en) 1929-12-16

Family

ID=8130503

Family Applications (1)

Application Number Title Priority Date Filing Date
DK41290D DK41290C (en) 1929-01-12 1929-01-12 Apparatus for Practicing Addition and Subtraction for Children.

Country Status (1)

Country Link
DK (1) DK41290C (en)

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