CN212208659U - Arithmetic ruler - Google Patents

Abstract

An arithmetic ruler for helping children to know numbers and quickly carry out addition and subtraction operations. The double-sided ruler is composed of a main ruler, an auxiliary ruler, a groove on the double sides of the main ruler, an internal thread bolt and a screw rod. Through pulling the auxiliary ruler, the digital identification and the tower type number scale on the main ruler and the auxiliary ruler are opposite, the number identification type operation is carried out according to the accumulation or consumption of the tower type number scale, and the rapid operation can also be carried out according to the digital identification. For example: 9+2 can be on the main scale 9 at 2 positions; the following steps are repeated: 12-3 is 3 bits back on the main scale 12, so as to achieve the purpose of fast calculation.

Description

Arithmetic ruler

Technical Field

The invention relates to an arithmetic tool, in particular to an arithmetic ruler capable of performing addition and subtraction fast operation.

Background

It is known that mathematics is a foundation of natural science, and our human beings are in childhood, and are generally not smooth for learning mathematics, and most children are in a loss of learning about subjects similar to 15+8 or 13-7, so that the children lose learning interest.

Disclosure of Invention

In order to establish the confidence of children and make the learning simpler, the invention provides an arithmetic ruler which can identify numbers and can quickly carry out addition and subtraction operations.

Technical scheme

The technical scheme of the invention is as follows: the main scale, the auxiliary scale, the double-sided groove of the main scale, the internal thread bolt, the screw, the number mark, the tower type number mark, the plus and minus symbol mark, and the flat groove of the auxiliary scale form the whole structure of the arithmetic scale.

The main scale and the auxiliary scale are rectangular in shape, the main scale is of a hollow structure, and the auxiliary scale penetrates into the main scale and is slightly longer than the main scale. The two sides of the main ruler are provided with double-sided grooves, the flat grooves on the auxiliary ruler are matched, the main ruler and the auxiliary ruler are connected into a whole through an internal thread bolt and a screw rod, and the auxiliary ruler can be pulled left and right under the condition that the bolt is lower than the double-sided grooves.

The invention uses plastic transparent material, the top ends of the main ruler and the auxiliary ruler are provided with 0 to 15 number marks, and the same number of small round dots are added beside each number so as to be convenient for identifying numbers. When 1+2+3+4 are superimposed by ten small dots, it becomes a tower, and outside each tower, it is counted again. And in front of the auxiliary ruler digital mark, a plus sign is added on one side, and a minus sign is added on the other side. When addition operation is needed, the auxiliary ruler is pulled to enable the numbers on the main ruler and the auxiliary ruler to correspond, for example: 5+2, the accumulation operation can be carried out according to the small dots on the tower type number scale, the quick operation can also be carried out on the number 2 of 5, the small dots on the tower type number scale are correspondingly accumulated while the answer 7 is obtained, and the subtraction operation can be carried out on the other surface relative to the ruler. For example: 12-3, then we can step back 3 on the number of 12, and likewise get answer 9 while the small dots change from 12 to 9. Therefore, the purpose of fast operation is achieved, and meanwhile, children can recognize that the addition lies in accumulation and the subtraction is equal to consumption in the operation process.

The invention has the beneficial effects that: a tool for fast calculation is provided to simplify learning.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic diagram of the construction of an arithmetic ruler.

Fig. 2 is a view of an arithmetic ruler addition surface.

Fig. 3 is a structural diagram of an arithmetic ruler reduction surface.

Fig. 4 is a structural view of the female pin and the screw.

Fig. 5 is a schematic structural view of the main scale double-sided groove.

Part number description in the schematic:

1 main scale, 2 auxiliary scales, 3 main scales, 4 double-sided grooves, 4 internal thread bolts, 5 screw rods, 6 digital identification and 7 tower type digital identification

8 addition and subtraction symbol mark 9 auxiliary ruler flat groove

Detailed Description

In the embodiment shown in fig. 1: the auxiliary ruler 2 is arranged in the main ruler 1 with a hollow structure, the double-sided groove 3 of the main ruler is matched with the flat groove 9 of the auxiliary ruler, and the internal thread bolt 4 and the screw rod are connected into a whole, so that the auxiliary ruler 2 can drive the internal thread bolt 4 and the screw rod to freely slide left and right in the main ruler 1.

In the embodiment shown in fig. 2: when an addition operation is required, for example; 2+2, can pull the vice chi 2 and let 2 of the figure 2 on the main scale 1 and the figure on the vice chi 2 relative, through adding, subtraction sign 8 mark on the vice chi, form 2+ 2's three-dimensional formula, during the operation, accessible tower number mark 7, promptly: the accumulation of the small dots is used for identifying numbers and carrying out digital operation, and the quick operation can also be carried out on the numbers of the main scales 1 and 2 by 2.

In the embodiment shown in fig. 3: when performing the subtraction, for example: 12-3, the auxiliary ruler 2 can be pulled to enable 12 on the main ruler 1 to be opposite to 3 on the auxiliary ruler 2, a three-dimensional formula of 12-3 is formed through the addition and subtraction symbol marks 8 on the auxiliary ruler 2, and the operation can be carried out according to the tower type number scale and the method of moving 3 up and down on the main ruler 1 in the same way.

Claims (2)

1. The utility model provides an arithmetic ruler, it comprises main scale (1), vice chi (2), main scale double-sided recess (3), internal thread bolt (4), screw rod (5), digit sign (6), tower number mark (7), add, subtract symbol mark (8), vice chi straight flute (9), characterized by: digital marks (6) are arranged on two sides of the main scale (1) and the auxiliary scale (2), adding and subtracting symbol marks (8) are arranged on two sides of the auxiliary scale (2), and adding and subtracting operations of carry and retreat are carried out on the main scale (1) by pulling the auxiliary scale (2).

2. The arithmetic ruler of claim 1, wherein: the auxiliary ruler (2) is matched with the auxiliary ruler flat groove (9) through the main ruler double-sided groove (3) in the main ruler (1), and the internal thread bolt (4) and the screw rod (5) are connected into a whole, so that the auxiliary ruler (2) can slide left and right in the main ruler (1).

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