The contents of this unit include: understanding the eight directions in real situations, namely, east, south, west, north, northeast, northwest, southeast and southwest, and describing the direction of objects with these words; Understand how to express the direction on the plane and describe the relative position of objects on the plane; First, let students use what they have learned to solve practical problems in life.

Second, divisor is the division of single digits.

The main contents of this unit are: oral calculation, written calculation and estimation problem solving. "Divider is the division of single digits" is the basic knowledge and skill that primary school students should master and form, and it is also the basis for further learning multi-digit division through writing.

Third, the composite statistics table

According to the requirements of Mathematics Curriculum Standard for Compulsory Education (20 1 1 Edition), the teaching of statistical knowledge is moved backward as a whole, and the compound statistical table originally arranged in the second volume of grade two is moved to this book to guide students to further experience the methods and significance of statistics. Especially with the help of the study of composite statistics, we can further realize the necessity of data collection and the diversity of data analysis methods, and realize the rich information contained in data and its application value.

Four, two-digit times two-digit

This unit includes oral calculation, two-digit multiplication and two-step calculation to solve problems.

Verb (abbreviation for verb) area

The main learning contents of this unit include four parts: area and area unit, area calculation of rectangle and square, progress rate between area units, and solving simple practical problems by using what you have learned. Describe the concept of "area" with concrete examples, and ask students to say the area of other objects' surfaces accordingly.

Six, year, month and day

This unit mainly includes: understanding the year, month and day, and understanding the relationship between them; Understand the normal year and leap year, understand the 24-hour timing method, and express the time with the 24-hour timing method; Understand the meaning of time and instant, and calculate the simple elapsed time.

Seven, the preliminary understanding of decimals

The learning content of this unit mainly includes two parts: knowing decimal and simple addition and subtraction of decimal. Compared with the experimental teaching materials, the requirements are lower. Compared with the meaning and size of decimals, the addition and subtraction of decimals is limited to one decimal place.

Eight, mathematics wide angle-collocation (2)

Students have been exposed to simple permutation and combination in the study of wide-angle volume I of mathematics in senior two. On this basis, the difficulty of this unit is slightly improved, not only the data is increased, but also the problem situation is more complicated. At the same time, a more concise and abstract expression is given, which further cultivates students' ability to think in an orderly and comprehensive way.