Teaching plan of "Countdown Understanding" open class in the sixth grade of the new curriculum standard of People's Education Press.

1, understand the meaning of reciprocal, master the method of finding the reciprocal of a number, and skillfully write the reciprocal of a number.

2. Guide students to cooperate and study independently, cultivate students' generalization ability in combination with teaching practice, and stimulate students' interest in learning.

Teaching emphasis: understand the meaning of reciprocal and master the method of finding reciprocal.

Teaching difficulty: skillfully write the reciprocal of a number.

Teaching aid preparation: multimedia courseware.

Teaching process:

First, situational introduction.

1, oral calculation.

5/ 12×2/5 = 15/7 ×7/5 = 1 1/8 ×8/ 13 =

5/2 1× 1/5 = 3/ 16 ×7/3 = 8/2 1 ×7/8 =

Consider it independently first, and then modify it by name.

2, compare, see who is right who is fast:

2/3×3/2 = 2× 1/2 = 1 1/8 ×8/ 1 1 =

1/ 10× 10= 7/9×9/7 = 1/7×7=

6/5×5/6 = 1/5×5 = 22/35×35/22 =

Students do oral calculations independently, and then do oral corrections. Observe these formulas and tell me what you find.

Design intention: Through oral calculation, observation and thinking, stimulate students' interest in learning and strong desire to explore, so that students can get positive emotional experience.

Second, cooperation and exploration.

1, group cooperation and communication:

(1) Tell your deskmate what you found.

(2) Please name three multiplication formulas similar to the above.

The representative of the group described his findings. Tell me your own example.

Teacher: The product like this is two numbers of 1. We say their relationship is reciprocal.

Teacher: What do you already know about reciprocal? (Students talk about their existing knowledge)

Teacher: How does the book explain the countdown? Let's read together.

Read the textbook for further understanding.

Teacher: Now, who can tell us how they understand the reciprocal?

Teacher's summary: If the product of two numbers is 1, then we call one of them the reciprocal of the other, and the two numbers are reciprocal to each other.