(2) Teaching objectives:
1. Understand the meaning and nature of decimals, understand the application of decimals in daily life, further develop the sense of numbers, master the law of decimal size change caused by decimal position movement, and master the addition and subtraction operation of decimals.
2. Master the operation order of elementary arithmetic and carry out simple integer elementary arithmetic; Explore and understand the operation rules of addition and multiplication, and use them to perform some simple operations to further improve the calculation ability.
3. Knowing the characteristics of triangles, we will classify triangles according to the characteristics of sides and angles, and know that the sum of any two sides of a triangle is greater than the third side, and the sum of the inner angles of the triangle is 180.
4. Understand the average, know the composite bar chart and its characteristics, initially learn to analyze the trend of data according to charts and data, and further understand the role of statistics in real life.
5. Experience the process of finding, putting forward and solving problems in real life, understand the role of mathematics in daily life, and initially form the ability to comprehensively use mathematical knowledge to solve problems.
6. Let students experience the process of observing objects from different positions and cultivate their spatial imagination and reasoning ability.
7. Further explore the characteristics and properties of axisymmetric graphics, and draw a translated graphic.
8. Experience the fun of learning mathematics, improve the interest in learning mathematics, and build confidence in learning mathematics well.
9. Develop the good habit of working hard and writing neatly.
(3) Teaching emphasis: the meaning and nature of decimals, addition and subtraction of decimals, operation rules and simple calculations, and triangles are the focus of this textbook.
(4) Teaching difficulties: The movement of figures and triangles is the difficulty of this book.
Third, the writing characteristics of teaching materials
1. Improve the arrangement of four operations, reduce the learning difficulty and promote the improvement of students' thinking level.
2. Understand the teaching arrangement of decimals, pay attention to students' understanding of the meaning of decimals, and develop students' sense of numbers.
3. Provide rich teaching content of space and graphics, pay attention to practice and exploration, and promote the development of students' space concept.
4. Strengthen the teaching of statistical knowledge, so that students' statistical knowledge and concepts can be further improved.
5. Infiltrate mathematical thinking methods step by step to cultivate students' mathematical thinking ability and problem-solving ability.
6. The cultivation of emotion, attitude and values permeates mathematics teaching, and stimulates students' interest and inner motivation with the charm of mathematics and the harvest of learning.
Unit 1 Four Operations teaching material analysis
(1) Description: This unit is the key unit of this book. This unit mainly teaches and combs the order of mixed operations. Before the mixed operation, the students have learned to calculate the two-step problem from left to right and know the function of brackets. Here, we mainly teach the operation order including two-level operation, and sort out the order of mixed operation. Its main contents include: sorting out the operation order at the same level, teaching sorting out the operation order at two levels, the operation order in brackets, and the operation around 0.
(2) Teaching objectives:
1, further grasp the operation sequence including two-level operation, and correctly calculate the three-step problem.
2. In the process of exploring and communicating to solve practical problems, I feel some strategies and methods to solve problems, and learn to solve some practical problems through two or three steps of calculation.
3. In the process of solving practical problems, develop study habits such as careful examination of questions and independent thinking.
(3) Teaching emphasis: Mastering elementary arithmetic progression and mixed operation sequence with brackets.
Teaching difficulty: sequential learning of elementary arithmetic.
(5) Teaching suggestions:
A new highlight of this unit is the combination of sorting out the order of mixed operations and solving problems. Target middle school students should not only master the operation sequence, but also understand the basic strategies and steps of solving problems. From the students' point of view, students have a certain operational basis, so it is suggested that:
1, with application questions as the warp and operation sheets as the weft. According to the different situations of students, each has its own emphasis.
2, strengthen the basic operation, to ensure the calculation accuracy.
In the teaching of this unit, we should try our best to provide students with opportunities to explore, let them experience the process of creation, and understand the rationality of the operation order and the meaning of brackets. In the process of exploration, students' thinking is independent, their choices are open and their expressions are diverse.
Lesson 65438 +0: The meaning of addition and subtraction and the relationship between the parts.
Teaching content: P2~3: Example 1 "Do it"
Teaching objectives:
Knowledge and skills: summarize the meaning and relationship of addition and subtraction from examples, and initially understand the meaning and relationship of addition and subtraction.
Process and method: Learn to use the relationship between the parts of the addition and subtraction formula to solve the unknowns in the addition and subtraction formula.
Emotion, attitude and values: cultivate students' ability to find and solve problems with mathematical knowledge.
Teaching emphasis: understand the meaning of addition and subtraction, and use the relationship between addition and subtraction to find the unknowns in addition and subtraction.
Teaching difficulty: Explore the reciprocal relationship of addition and subtraction from examples.
Teaching aid: multimedia courseware
teaching process
First, check the import.
1, oral calculation
2. Written calculation
Step 3 import