DE234611C - - Google Patents
Info
- Publication number
- DE234611C DE234611C DENDAT234611D DE234611DA DE234611C DE 234611 C DE234611 C DE 234611C DE NDAT234611 D DENDAT234611 D DE NDAT234611D DE 234611D A DE234611D A DE 234611DA DE 234611 C DE234611 C DE 234611C
- Authority
- DE
- Germany
- Prior art keywords
- arithmetic
- abacus
- student
- board
- pennies
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
Landscapes
- Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Entrepreneurship & Innovation (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Packaging For Recording Disks (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE234611C true DE234611C (enExample) |
Family
ID=494459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT234611D Active DE234611C (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE234611C (enExample) |
-
0
- DE DENDAT234611D patent/DE234611C/de active Active
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