1. Pay attention to the understanding and guidance of "..." in teaching. In Chinese, "..." means to omit some contents, which has the function of spacing, explaining and infiltrating extreme thoughts in mathematics.
For example, in the division teaching with remainder, 14 ÷ 4 = 3...2 appears, in which "…" replaces the word "remainder" to separate the incomplete quotient from the remainder, thus playing the role of separation.
For another example, in the first volume of the first grade mathematics paradise, the experimental textbook of the new curriculum, a child said, "Go in the order of 1, 2,3 ... 9". "..." Here plays the same role as Chinese, omitting the numbers 4, 5, 6, 7 and 8.
In addition, the symbol "…" in the concept of "0, 1, 2, 3, 4, 5 … indicates that the number of objects is called a natural number" permeates the limit idea, indicating that the natural number is infinite.
2. Pay attention to the use of ""symbol in teaching. This symbol has two special meanings in mathematics: first, it stands for decimal point and is pronounced as "point", for example, 1.2 is pronounced as "1.2". The second is multiplication. In the formula containing letters, the multiplication sign between numbers and letters and between letters can be recorded as "",such as 2 a, ","plays an interval role in Chinese, such as lev tolstoy. ""means a period in English. It is worth mentioning that many math teachers try to distinguish between "0" and ".".Generally, "."is not used, but some places should be paid attention to, especially when writing on the blackboard. For example, when teaching decimals, if "."is written casually, it may cause misunderstanding among students. For example: 36.98. Because the teacher casually "",his students misread it as "36.98".
3. Pay attention to the application of ":"in mathematics teaching. ":"is a colon in Chinese and a comparative symbol in mathematics, indicating the relationship between two numbers. For example, 3: 2 is pronounced 3 to 2. Teachers should also guide students to understand that 3: 2 in sports competitions is also pronounced as 3: 2, but this comparison symbol does not represent the relationship between two numbers, but is just a habitual recording symbol. ":"is also used in the 24-hour clock at a certain time, for example, 2 pm is recorded as 14: 00 by the 24-hour clock.
4. Pay attention to the application of quotation marks. In the teaching of fractions, the unit "1" is used to represent a whole. Teachers should be careful not to omit quotation marks when writing, otherwise it will become a natural number of 1.
5. Pay attention to the application of ","and ",". In some small places, we should pay attention to accurate application. When Wayne diagram is used to represent a set, such as 135 ..., punctuation ","or ","cannot be added between elements at this time.
In a word, math teachers should pay attention to every punctuation mark, apply every punctuation mark accurately, avoid randomness, and really make punctuation marks play a special role in math teaching, thus optimizing classroom teaching.