Combined multifunctional mathematics teaching apparatus
A multi-functional, teaching instrument technology, applied in teaching models, instruments, educational appliances, etc., can solve the problems of integrity, relevance, and intuition that cannot be fully expressed, single purpose, and inability to combine, etc., and is conducive to acceptance and understanding. Effect
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[0020] As shown in Figure 1, the unit system ruler 1 is marked with three units, that is, starting from "0, 1" to "9" in millimeters, starting from "1, 1" to "9", and starting from "2, 1" to "9". From 1" to "9", increase the starting number and repeat the arrangement.
[0021] 1. To measure the length of a shorter object, use a student scale to measure.
[0022] (1) Draw, feel, and experience the lengths of 1 mm, 1 cm, and 1 decimeter on the scale, recognize three different length units, and establish three different digits and digit sequences of "centimeters".
[0023] (2) Determine the basic unit (display the accuracy of measurement and the standard of calculation), and establish the first number. If it is determined that 1 mm is the basic unit and mm is the first digit, the scale can display numbers from 1 to 9 (one digit), 10 to 99 (two digits), and only 100 to 210 (three digits); if it is determined that 1 centimeter is the basic unit and centimeter is the first digit, ...
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