The content structure of this book

The first unit, angle, minute and decimal.

The second element is symmetrical, translational and rotational.

The third unit multiplication

Unit 4 area

Unit 5 Cognitive Score

Unit 6 Statistics and Possibility

Angle and decimal of the first unit

Unit knowledge point

1. Combined with the specific situation of shopping, I have a preliminary understanding of the meaning of decimals and can read and write simple decimals.

2. By exploring the process of how to compare decimal sizes, we can compare decimal sizes according to the shopping situation.

3. Can calculate the addition and subtraction of a decimal, and can solve some related simple problems. (closely related to elements, angles and minutes)

4. Be able to use decimals to express some things in daily life and communicate.

Buy stationery

1. Understand the specific meaning of decimals, understand the relationship between decimals and the units of actual quantities they represent, and recognize and read simple decimals.

Compare these decimals with the numbers they have learned before, and let them find that all decimals have decimal points.

3. Pay attention to the special position of "0" in decimal system.

Shop around; Shopping around

1. Master the method of comparing decimal sizes flexibly and compare decimal sizes independently.

2. Cultivate the awareness of estimation.

3. The continuous "0" at the end of the decimal part can be removed.

Buy a book.

1. In the process of various algorithms, teachers should guide students to observe the * * * situation of different algorithms, that is, the numbers of the same unit (digits) can only be added.

2. Master vertical decimal addition and subtraction.

3. Master the vertical format (decimal point alignment).

Send a book

1. Use decimal knowledge to solve practical problems in life.

2. Correctly handle the arithmetic problems that need to be carried or abdicated in the process of decimal addition and subtraction.

3. Flexible use of estimation knowledge, and can explain the estimation process.

The second element is symmetrical, translational and rotational.

Unit knowledge point

1. Perception of symmetry, translation and rotation, with examples.

2. You can draw simple graphics on the grid paper after translating horizontally and vertically.

3. Combined with the process of pattern appreciation and design, understand the role of translation, rotation and axial symmetry in pattern design.

Give full play to students' creativity and personality, and feel the beauty of graphics.

axial symmetric figure

1. Understand the characteristics of axisymmetric graphics.

2. You can draw simple axisymmetric figures on square paper.

Mathematics in the mirror

1. The inside and outside of the mirror are opposite.

2. Use the phenomenon of mirror symmetry to judge the position and direction of some graphics, such as the exercise on page 17.

Translation and rotation

1. Perception of translation and rotation

2. Judge the translation and rotation of objects in daily life.

3. You can draw a simple figure on a square paper after translating horizontally and vertically, such as 19 page.

Unit 3, Multiplication

Unit knowledge point

1. Multiplying two digits by integer ten: Explore the multiplication calculation with integer ten as the factor and find out the calculation law.

2. Multiplying two digits by two digits (no carry): Through the estimation and diversification of AC algorithm, the process of multiplying two digits by two digits (no carry) is explored.

3. Multiply two digits by two digits (carry) to further master the calculation method of multiplying two digits by two digits (carry). And can be correctly estimated and calculated. Solve simple practical problems.

4. Solve related simple practical problems, consolidate the calculation method of two digits, enable students to calculate correctly and improve their calculation ability, so as to understand the close relationship between mathematics and real life and feel the application of mathematics in real life.

Looking for rules

1. Multiplier is an integer decimal multiplication algorithm: if one factor is unchanged and another factor is expanded several times, the product is also expanded by the same multiple.

2. In the calculation of multiplying two digits by two digits, let students experience the process of alternating multiplication.

Live in a new house

1. Multiplying two digits (no carry) has gone through the process of diversifying estimation and communication algorithms. Experience the diversity and flexibility of algorithms.

2. Master the basic method of vertical calculation. Pay attention to the writing format and understand that the corresponding values should be aligned.

3. Accurately describe the calculation principle of each step in vertical calculation.

Electronic cinema

Knowledge point: 1. Accurately describe the calculation method of multiplying two digits by two digits (carry).

2. Be able to estimate and calculate correctly and solve problems in real life.

3. In the process of calculation, pay attention to the carry of multiplication.

Travel mathematics

1. car rental activity: permeated with the strategic idea of going public to solve problems, we know that the most economical strategy is to fill the seats of the car as much as possible. If it can't be filled, there must be as few vacancies as possible.

2. Catering activities: You should know the importance of reasonable choice. Review the knowledge of applying decimal addition and subtraction.

3. Tourism computing: data collection and data processing.

Surface area of the fourth unit

Unit knowledge point

1 cognitive area

2 cognitive area unit: square meters (m? ) square decimeter (dm? ) square centimeter (cm? )

3 Calculate the area of rectangle and square: the area of rectangle = length × width.

Area of a square = side length × side length

4 area unit conversion: 1 decimeter? = 100 cm？

1 m? = 100 decimeter?

1 hectare =10000m?

1 km？ =100000000 meters?

1 km？ = 100 hectare

What is a region (cognitive region)

1. Understand the meaning of graphic area through students' participation in painting activities.

2. Experience the diversity of comparison strategies by comparing the sizes of two graphs.

3. Cultivate students' hands-on operation ability, comprehensive analysis ability, preliminary space concept and cooperation and communication ability.

Measure.

1 Guide students to explore the calculation formula of rectangular area, understand the calculation method of rectangular and square area, and calculate the rectangular and square areas correctly.

2. Guide students to estimate the given rectangular and square areas, and cultivate students' spatial concept and geometric intuitive ability.

3. Experience the application of mathematics knowledge, feel the mathematics around you, and experience the fun of learning and using mathematics.

Swing (rectangular or square area)

1. Guide students to explore the calculation formula of rectangular area, understand the calculation method of rectangular and square area, and correctly calculate the area of rectangular and square.

2. Guide students to estimate the given rectangular and square areas, and cultivate students' spatial concept and geometric intuitive ability.

3. Experience the application of mathematics knowledge, feel the mathematics around you, and experience the fun of learning and using mathematics.

Floor laying (conversion of area units)

1. Combined with the specific situation of solving the problem, we realize the necessity of converting area units and using large area units.

2. Master the conversion relationship between area units and solve some simple problems by using area conversion.

3. Initially cultivate students' practical operation, analysis, comparison and comprehensive ability, and further develop the concept of space.

Unit 5 Cognitive Score

Unit knowledge point

The meaning of the score of 1: like 1/2, 1/4, 2/4, … are all scores. Can read and write simple music.

For example, reading: three quarters.

2 relatively simple size, the rules are as follows: the same fraction is greater than the size, and the larger the molecule, the greater the fraction. minute

When the mothers are different and the molecules are the same, the number of molecules is large and the score of denominator is small.

3. Add and subtract fractions with the same denominator (denominator is less than 10) as follows: fractions with the same denominator (denominator is less than).

10) addition and subtraction, denominator unchanged, numerator addition and subtraction.

Divide one point (one)

1. Get a preliminary understanding of the meaning of fractions, such as 1/2, 1/4, 2/4 ... are all fractions. Such as: 3/4, that is, the whole is divided into 4 parts on average, and the largest part is taken.

2. Understand the composition of big points, and be able to read and write simple big points. For example, reading: three quarters.

3. Can use origami, coloring, etc. To express simple scores.

Divide by one point (two)

1, combined with the specific situation (a whole composed of many individuals), to further understand the meaning of the score.

2, know and find out who is the whole, feelings can be expressed in one or several parts of the whole composed of multiple individuals with scores.

Ratio size (size of comparison score)

The comparison of scores mainly includes two parts:

The comparison method between the fraction of 1 and the denominator (the denominator is less than 10) is as follows: when the denominator's fraction is relatively large, look at the numerator, and the numerator's large fraction is large, while the numerator's small fraction is small.

The comparison of two fractions of a fraction is as follows: When two fractions of a fraction are relatively large, look at the denominator. Scores with large denominator are small, and scores with small denominator are large.

Eat watermelon (addition and subtraction of the same denominator score)

Combined with the actual problem-solving process, this paper explores the addition and subtraction operation method of fractions with the same denominator (denominator less than 10).

The method is as follows: when the denominator score is added or subtracted (the denominator is less than 10), the denominator remains unchanged and the numerator is added or subtracted.

Unit 6 Statistics and Possibility

Unit knowledge point

1, through rich examples, understand the meaning of the average, understand the necessity of learning the average, and find the average of simple data (the result is an integer).

2. Ask and answer simple questions according to the data in the statistical chart, and communicate with your peers.

3. Be able to list all possible results of a simple test and know whether an event is likely to happen or not.

4. Describe the possibility of some simple events and communicate with peers.

Which group will the medal be awarded to?

1, combined with the problem-solving process, understand the meaning and necessity of the average.

2. Be able to understand simple statistical charts and solve some simple practical problems according to statistical charts.

Guess

1, through the possibility test process, we know that the possibility of an event is large or small.

2. Be able to list all possible results of a simple test.

3. Describe the possibility of some simple events and communicate with peers. Interviewee: zhangylbd | Level 4 | 201-3-27 22: 38

The application of multiplication and division and some preliminary knowledge of statistics, if it is PEP!

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