"Using Ordinal Number Pairs to Represent Positions" PPT courseware

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"Using Ordinal Number Pairs to Represent Positions" PPT courseware

Observe and think

Question 1: In a physical education class, if 48 people in the class stand in a row, how do you indicate the position of a certain student?

Question 2: If the students are arranged in 6 rows and 8 columns (as shown below), how to indicate the positions of Xiaoliang, Xiaoying, and Dagang in the queue?

think about it

1. How much data is generally required to determine the position of an object in a plane using this method?

2. There is a one-to-one correspondence between the position of objects on the plane and the ordered number pairs.

3. On the map and in reality, can the geographical location of each city, building, island, ship, etc. be expressed in the form of an ordinal number pair?

Expand exploration

Question 1: Fishing boat A departs from the island and travels due south. Can you determine the position of the fishing boat?

Question 2: Fishing boat A departed from the island and traveled at a speed of 25 kilometers per hour for 1 hour. Can you determine the position of the fishing boat?

Question 3: Fishing boat A departed from the island and traveled in a direction of 40° north by east at a speed of 25 kilometers per hour for 1 hour. Can you determine the position of the fishing boat?

Compliance testing:

1. Which of the following statements is wrong ( )

A. Determining the position of a point in the plane generally requires two pieces of data.

B.(1,2) and (2,1) represent the same point

C. Determining the position of a point on a straight line only requires one piece of data.

D. There is more than one way to determine the position of a point in the plane

2. The following sentences: (1) No. 6, row 5; (2) 23° south by east

(3) No. 68 Jiefang Road; (4) 60° north latitude and 90° east longitude. The one that can determine the specific location of the object is ________ (fill in the serial number).

3. The position of "general" can be expressed as (5,2), and the position of "handsome" can be expressed as __________

Class summary

There are many ways to determine the position of a point in the plane, but generally two pieces of data are needed to locate it.

There is a one-to-one correspondence between the position of an object in the plane and a pair of ordered numbers.

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For more information about the PPT courseware "Using Ordinal Pairs to Represent Positions", please click the Use Ordinal Pairs to Represent Positions ppt tag.

"Using Ordinal Number Pairs to Express Positions" PPT Courseware 2:

"Using Ordinal Number Pairs to Represent Positions" PPT Courseware 2 Learning Objectives: 1. Let students experience different methods of determining the position of objects in real situations. 2. Be able to use ordered number pairs to determine the position of objects. 3. Let students feel the close connection between life and mathematics, and train students to learn mathematics..

File Info

Update Time: 2024-11-13

This template belongs to Mathematics courseware Qingdao Edition Seventh Grade Mathematics Volume 2 industry PPT template

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