1, so that students can know a score, read and write a simple score, know the names of each part of the score, and compare the sizes of the scores.

2. Cultivate students' cooperative consciousness, inductive reasoning ability and language expression ability through group cooperative learning activities.

3, in the hands-on operation, observation and comparison, cultivate students' courage to explore and learn independently, so that they can obtain successful experience in using knowledge to solve problems.

Prepare teaching and learning tools: courseware, round, rectangular and square paper.

Teaching process:

First, create a situation to stimulate interest.

Teacher: We learned a score last class. Can you express a score you like with a rectangular piece of paper in your hand?

Students origami and color, showing the score of a rectangular paper.

Show and let the students say what they think.

Teacher: If you just smeared two or three copies on the paper, which score should you use?

Today, we will learn "Several Fractions". (blackboard writing topic)

Second, hands-on operation, explore new knowledge.

1, what was your initial understanding?

(1) In a group of four, each student divides the square paper in his hand into four parts on average. You can draw as many as you want, and then write down how many parts of the colored part are squares, and then tell the students in the group what they think.

Students operate manually and communicate in groups.

(2) Who can come up and show it and talk about their own ideas?

(3) Multimedia demonstration pictures.

Q: Can you find out how they express themselves? What's the difference between it and a quarter?

Divide the square into four parts on average, 1 is one quarter of it, 2 parts are two quarters of it, 3 parts are three quarters of it, 4 parts are one quarter of it, and the number of copies taken is several quarters. It is compared with a quarter, but the number of parts taken is different.

2. Expand your thinking and know the name of the score.

(1) Let the students draw a line segment of 1 decimeter on the notebook with a ruler, and then divide the line segment into 10 on the scale of the ruler. (Students draw lines) Can you tell me how much each copy is?

(2) Take several copies from each other at the same table and tell the corresponding scores.

(3) Can you imitate these music scores and name one yourself?

(4) Know the names of each part of the score. (numerator, denominator, fractional line)

3. Compare the scores of the same denominator.

Give a set of scores in Example 6, and let the students discuss how to compare in groups.

Feedback.

Compare the second group in the same way.

Guide students to summarize and compare the basic methods of fractions with the same denominator.

Third, consolidate practice.

1, do it 1, 2.

2. Show a group of scores with the same denominator on the blackboard, and ask students to show these scores on circular cards with the same size. Then, one person at the same table compares to see who is older.

Fourth, class summary.

What did you learn in this class? Observe where the grades are used in our lives after class.