Multifunctional mathematical probability demonstration device

Abstract

A multifunctional mathematical probability demonstration device comprises a shell, a locking door arranged on the shell, a first sleeve arranged on the inner top face of the shell, a second sleeve arranged below the first sleeve, a first motor arranged on the inner wall of the shell, a first electric telescopic rod arranged on the inner bottom face of a connecting frame, a check ring arranged on the movable portion of the first electric telescopic rod, a discharging pipe arranged on the outer ring of the check ring, a sliding rail is arranged at the bottom of the discharging pipe, an electric sliding block is arranged on the sliding rail, a box body is arranged on the inner top face of the shell, a feeding hole is formed in the top face of the shell, a plurality of white balls and black balls are arranged in the second sleeve, the number of the white balls and the number of the black balls are equal, the mass and the size of the white balls and the mass and the size of the black balls are equal, and a controller and a storage battery are arranged on the outer wall of the shell. The probability of various different conditions is demonstrated by controlling the starting time of a first motor, the probability of 'and' 'or' events can be demonstrated at the same time, after demonstration is completed, balls in the discharging pipe fall into the charging barrel, the feeding mechanism conveys the equal white balls and black balls into the second sleeve, and multiple times of demonstration is facilitated.

Description

technical field [0001] The invention belongs to the field of mathematical probability demonstration devices, in particular to a multifunctional mathematical probability demonstration device. Background technique [0002] Probability is an important knowledge point in mathematics. In order to allow students to grasp the knowledge point of probability faster, teachers often show students the probability of various situations through some small games such as catching the ball, and then proceed in this way. In the demonstration process, it is easy to cause great variables due to factors such as the small degree of shaking, and at the same time, due to the small number of demonstrations, it is easy to cause great accidents, thereby reducing the demonstration effect of the demonstration device. " and "and" and other probabilities of different situations. Contents of the invention [0003] The invention provides a multifunctional mathematical probability demonstration device to ...

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Problems solved by technology

[0002] Probability is an important knowledge point in mathematics. In order to allow students to grasp the knowledge point of probability faster, teachers often show students the probability of various situations through some small games such as catching the ball, and then proceed in this way. In the demonstration process, it

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