DE1692492U - TEACHING MATERIALS FOR TEACHING DECIMAL CALCULATION. - Google Patents

Description

Madame ITeenre Emile Alfred GIB. & BDEÜ !, ηέβ Maria P & ULY 59> Avenue Kersbeeic, a Brozelles (Belgiqae ')

Lelirmittrel for teaching in the Bezimalreelinea,

The following priority is requested ι

Country? Belgium

! Eag ι 23 * October 1955 Hr- '525 * 737.

It is a teaching tool known to learn of the decimal system, "the parallel of a number, and rertjundener by a Eahmen Stäfce there are _t strung on welehe body - .the their actual ¥ ert units of length, play ^ which look from the division of the Meters in. Sesimeter, centimeter and millimeter result in *

Thus, on the first of three parallel rods body in ^ örm τση thin Blatten strung which the millimeter representing ^ on the second substantially würfelformige body> representing the centimeter and _ds on the third a body in the shape of an elongated _{Parallelopipe> which represents} a decimeter.

the price increase, the teaching material can be completed in the following way :

k) by a rod-shaped body with a rectangular or square cross-section for use by children, blind people or other pupils.

B) through a flat, stripe-shaped body to the-o-e for the teacher.

C) by a flat strip-shaped body made of pliable Material with colored surface for use for the student.

These bodies are shown in .den-3? ± gT T and 2. The rod-shaped body marked A is on three Provide areas with a division.

On one surface 21 there is the division into decimeters, on the second surface 22 the division into Centimeters and on the third surface - 23 the division into Millimeters »The millimeters can be included on a white background black lines, with the longer lines 24 denote tens, and are numbered with 10, 20, 30, ... u * s.f.

The centimeters can be represented by alternating squares marked in two different colors. (Area 22).

The decimeters can be displayed in one color without any special division * A white line 25, which is attached to every tens digit, enables the same with the divisions of the two other divided areas.

The ruler for the teacher, marked E, consists of a flat rod, which has three divisions 26,27,28 in its longitudinal direction, which correspond to the divisions of the correspond to the rod-shaped body on pages 21,22,23 »

The student ruler labeled C is similar the ruler B, but kept in the same colors, the bodies of the entrance lined up on bars the teaching material mentioned. These colors are supposed to demTDi2id * -e4ex_Sehüler the transmission of the physically represented Sizes in millimeters, centimeters and decimeters to facilitate the surface.

The ruler C is made of flexible material and can be used to illustrate the transfer of decimal dimensions to curved surfaces.

Claims (3)

1) Teaching aids for teaching decimal arithmetic, in connection with a device in which bodies of different thicknesses are lined up on parallel bars to represent millimeters and bezimeters, characterized by a bar of rectangular or square cross-section, whose an area - a division in decimeters, the second area of which is graded in centimeters and the third area is graded in millimeters. 2) Teaching aids for teaching decimal arithmetic in connection with a device in which bodies of various thicknesses are lined up on parallel rods to represent millimeters, centimeters and decimeters, marked by a flat plastic , which s / has three subdivisions in the longitudinal direction, in decimeters, centimeters and millimeters, for iekraaeh for ae teacher. 3) Teaching aids according to claim 1 and 2, geke η η ζ ei oh net by a flexible ruler, with three different divisions, which are kept in the same colors, like the bodies lined up on the bars.