Primary school mathematics is to teach children a series of knowledge about number, four operations, the calculation formula of figure and length, unit conversion and so on through textbooks, which lays a good mathematical foundation for junior high school and daily life calculation. Frieden Noel, a Dutch educator, said: "Mathematics comes from reality and must be rooted in reality and applied to reality."

Indeed, modern mathematics requires us to observe the world from a mathematical perspective and explain the world in mathematical language. Judging from the mathematics learning psychology of primary school students, the learning process of students is not a passive absorption process, but a reconstruction process based on existing knowledge and experience.

As follows:

When a fraction is converted into a percentage, the fraction is generally converted into a decimal (three decimal places are generally reserved when it is not used up), and then the decimal is converted into a percentage. In fact, to turn a fraction into a percentage, you must first turn the fraction into a decimal and then multiply it by 100%. Divide the percentage into components, and rewrite the percentage into components first, so that the quotation that can be lowered can be made into the simplest score.

To convert decimals into percentages, just move the decimal point two places to the right and add hundreds of semicolons at the end. In fact, to convert a decimal into a percentage, just multiply this decimal by 100%. To convert percentages to decimals, simply remove the percent sign and move the decimal point two places to the left.

1992 published the "May 4th" compulsory education textbook. In 200 1 year, a new round of basic curriculum reform in China was fully launched. Beijing Normal University devoted itself to the curriculum reform with a positive attitude, and published the National Curriculum Standard for Full-time Compulsory Education (Experimental Draft) exclusively, and took the lead in publishing the Experimental Textbook for Compulsory Education Curriculum Standard and the Experimental Textbook for Full-time Ordinary Senior High School Curriculum Standard, which attracted the attention of the industry for its novel ideas and high quality.

Up to now, tens of millions of primary and middle school students use the textbooks published by Beijing Normal University every year, and the basic education textbooks have become well-known brands of Beijing Normal University Press. Synchronous Unit Exercise, a classic teaching assistant of Beijing Normal University, pioneered the synchronous teaching assistant in China, and with its distinctive characteristics of assisting students, it has gone through the basic education course of 12 years and become a well-known brand of teaching assistant books.