0.8? 0.5= 4.2? 5= 12-0.9= 0.25? 1.6? 0.4=

12.5? 80= 2.34? 0.2= 7.73+2.07= 1.7+3.3? 0.2=

Second, think carefully and fill in carefully. 22 points

1, Xiao Ming is sitting in the third row of the fourth column in the classroom, indicated by (4,3), Xiao Fang is sitting in the fifth row of the second column, indicated by (), and the students indicated by (6, 1) are sitting in the first row of column ().

2. The positions where Zhang Ming and Jerry Lee are sitting in the classroom can be represented by points (3, 6) and (4, 5). In (3,6), 3 stands for the third column, 6 stands for (), and (4,5) stands for Jerry Lee sitting in the () column and () row.

3. As shown below: If the position of △ is (2,3), the position of ◆ can be expressed as (), and the position of ★ can be expressed as ().

4. As shown in the following figure: point A is (1, 1), point B is (), point C is (), and triangle ABC is () triangle.

Question 3, Figure 4

Third, compare repeatedly and choose carefully. 12 point

1. As shown in the figure, if the position of point A is expressed as (1, 3), the position of point B can be expressed as ().

A.(4，4) B.(4，5) C.(5，4) D.(3，3)

2. As shown in the figure, if Δ△ ABC moves 2 squares to the right, the position of vertex A is represented by a number pair as ().

A.(5 1)b .( 1，3) C.(7，4)d .(3 1)

Map 1 map 2

3. In science class, Cong Cong sits in the second row of the third column in the laboratory, which is represented by the number pair (3,2). Obviously, he sits in the first position directly behind Cong Cong, and the obvious position is indicated by the number pair ().

A.(3，3) B.(4，3) C.(3，2) D.(4， 1)

4. If point A is (1, 5), point B is (1, 1) and point C is (3, 1), then the triangle ABC must be a triangle ().

A. acute angle B. obtuse angle C. right angle D. isosceles

Fourth, apply knowledge to solve problems. 50 points

1. Write down the positions of the vertices of the triangle ABC first, and then translate the triangle ABC down by 4 units to draw the graph △ a.. b？ c？ , and then write the position of the vertex of the result graph.

Answer? ( )

b？ ( )

c？ ( )

The picture below shows a corner of the zoo. 14 point

(1) If (1, 3) is used to indicate the location of the gate, can several pairs be used to indicate the location of other amusement facilities? Please write it down. (8 points)

Panda Pavilion Elephant Pavilion Monkey Mountain Aquarium

(2) Mark the locations of the following venues on the map. (6 points)

Bird House (1, 1) Orangutan House (0,3) Lion Tiger Mountain (4,3)

3. Draw the following points and connect them into a closed figure in turn to see what this figure is. (10)

4. As shown below: The location of the library can be represented by (4,3), which is 400m to the east and 300m to the north of the school. (The company commander of each small square in the figure indicates 100m)( 13 points)

(1) Please describe the location of the gymnasium and children's palace respectively. (4 points)

(2) Wang is 300 meters east of the school and 400 meters north; Zhao Hua's home is 800 meters east of the school and 700 meters north. Mark the location of two classmates' homes in the picture. (4 points)

(3) What is the activity route of Wang Ling on Saturday (1, 7)? (4,3)? (6,4)? (3,6)? (9,6)。 Where did she go today? (5 points)

Expanding and upgrading questions: (plus 10)

Two people, A and B, start from two places at the same time and go in opposite directions, with a distance of 20km. 6k per hour

B Drive 4 kilometers per hour. A take a dog, and the dog travels every hour 10km. That dog is carrying a,

When you meet B, turn around and run to A. When you meet A, turn back until A and B meet. At this time,

How many kilometers did the dog run?