Teaching aid device for teaching the basic principles of arithme

Details Teaching aid device for teaching the basic principles of arithme Teaching aid device for teaching the basic principles of arithme

1978-02-21

1980-03-11

Grieb, William H.

G09B 1902

Patent

active

041920856

ABSTRACT:
One face of a tablet is divided into a plurality of adjoining regions. The two edge regions at the right and left have rows which in each region are divided into a plurality of fields and are numbered continuously with primarily basic numbers and their multiples, from one edge region continuing into the next. A number of slides, equal to the number of rows in each of the edge regions, lie loosely on the tablet, so that each slide may be pushed along the corresponding two rows which are at the same level of the edge regions in order, as desired, to thereby at least partially cover one or the other of these rows, so that the result of an arithmetic operation carried out in one or the other region can be read from the exposed field adjacent the end of the corresponding slide.

REFERENCES:
patent: 973905 (1910-10-01), Alexander
patent: 1165058 (1915-12-01), Behan
patent: 1188490 (1916-06-01), Robertson
patent: 1372087 (1921-03-01), Roddy
patent: 3147556 (1964-09-01), Prusmack
patent: 3690019 (1972-09-01), Fernandez

Affiliated with

Also associated with

Rating

Teaching aid device for teaching the basic principles of arithme does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Teaching aid device for teaching the basic principles of arithme, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Teaching aid device for teaching the basic principles of arithme will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1995182