I. Fill in the blanks (3 points for each small question, 24 points for * * *)

1.(- 1)2002-(- 1)2003=_________________.

Answer: 2

2. It is known that a certain number is larger than it. If a number is x, the equation _ _ _ _ _ _ _ _ _ _ _.

Answer: x=x+

3. As shown in figure 1, points A, B, C and D are on the straight line L, then BC = _ _ _ _ _ _ _-CD, AB+_ _ _ _ _+CD = AD; If AB=BC=CD, AB = _ _ _ _ _ _ BD.

Figure 1

Answer: BD, BC,

4. If ∠ α = 4132', its complementary angle is _ _ _ _ _ _ _ _, and its complementary angle is _ _ _ _ _ _.

Answer: 48 28', 138 28'

5. As shown in Figure 2, find the following angles: ≈1= _ _ _ _ _ _ _ _ _ _, ≈ 2 = _ _ _ _ _ _ _ _ _, ≈3 = _ _ _ _ _ _ _ _.

Figure 2

Answer: 62.5,25 130.

6. Two straight lines intersect, and there are _ _ _ _ _ _ _ _ intersections; Every two of the three straight lines intersect the largest _ _ _ _ _ _ _ _ and the smallest _ _ _ _ _ _.

Answer: and only one, three, one.

7.38 12′=_____________ ,67.5 =__________ ___________′.

Answer: 38.2, 67, 30

8. If x2-3x = 1 is a linear equation about x, then a = _ _ _ _ _ _ _ _ _ _ _ _

Answer:

Second, multiple-choice questions: (3 points for each small question, ***24 points)

9. Of the following statements, the correct one is

A.| A | is not a negative number B.-A is a negative number.

C.-(-a) must be positive. D. is not an integer.

Answer: a.

10. There are any three points on the plane. Draw a straight line through two of them, and you can draw * * *.

A. One straight line B. Two straight lines C. Three straight lines D. One or three straight lines

Answer: D.

1 1. Of the following drawing statements, the correct one is

A. draw a ray op = 3 cm B. connect point a and point B.

C. draw the midpoint between a and B. Draw the distance between a and b.

Answer: B.

12. The following figures can be folded into cubes.

Figure 3

1。

Answer: D.

13. The following figure is obtained by rotating the left figure around the straight line L.

Figure 4

Answer: D.

14. Figure 5 is a statistical map of crops in a village, in which the proportion of rice is

Figure 5

A.40% B.72% C.48% D.52%

Answer: C.

15. The following statement is correct.

① All right angles are equal; ② All complementary angles are equal; ③ The complementary angles of equal angles are equal; ④ Equal angles are right angles. Among them, the correct one is that

A.①② B.①③ C.②③ D.③④

Answer: B.

16. If | x-|+(2y+ 1) 2 = 0, the value of x2+ y2 is

A.B.

C.- D ...

Answer: B.

Third, answer the following questions

17. Calculation problem (3 points for each small question, *** 12 points)

( 1)(- )×(- 1 )÷(- 1 ) (2)32÷(-2)3+(-2)3×(- )-22

(3)( - )÷( - )2÷(-6)2-(- )2

(4) 1 ×〔3×(- )2- 1〕- 〔(-2)2-(4.5)÷3〕

Answer: (1)-1(2)-2 (3)-(4)-

18. Solve the equation: (5 points for each small question, *** 10)

( 1)〔x-)-8〕x+ 1

(2) - - =0

Answer: (1) x =-(2) x =-

19.(6 points) As shown in Figure 6, it is known that AOB is a straight line, OC bisects ∠ AOD, ∠ BOD = 50, and the degree of ∠AOC is found.

Figure 6

Answer: 65

20.(6 points) The complementary angle of an angle is 3 times larger than that of this angle 18. Find the degree of this angle.

Answer: 36

2 1.(6 points) Make an appropriate statistical chart to represent the data in the following table:

After the previous population censuses in China 1949

Year1953196419821990 2000.

Population (billion) 5.946.9510.081.3412.95.

Answer: You can make a bar chart (abbreviated).

22.( 12 minutes) The bus is 200 meters long and the truck is 280 meters long. They travel in opposite directions on parallel tracks. It takes 18 seconds from the time when two cars meet to the time when two cars leave each other. As we all know, the speed ratio of passenger cars to trucks is 5: 3. How many meters do two cars travel per second?

If the speed of the bus is 5x, the speed of the truck is 3x.

18(5x+3x)=200+280。

X=, that is, the bus speed is m/s and the truck speed is10 m/s. 。

References:

/question/4297 1029.html？ si=9

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[Master student]

549805 16 [Master] 2009-1-kloc-0/209: 35: 04 222.64.119. * Report.

How about the one with the answer? Seventh grade first semester final examination paper

(Time: 100 minutes, total 100 minutes)

I. Fill in the blanks (3 points for each small question, 24 points for * * *)

1.(- 1)2002-(- 1)2003=_________________.

Answer: 2

2. It is known that a certain number is larger than it. If a number is x, the equation _ _ _ _ _ _ _ _ _ _ _.

Answer: x=x+

3. As shown in figure 1, points A, B, C and D are on the straight line L, then BC = _ _ _ _ _ _ _-CD, AB+_ _ _ _ _+CD = AD; If AB=BC=CD, AB = _ _ _ _ _ _ BD.

Figure 1

Answer: BD, BC,

4. If ∠ α = 4132', its complementary angle is _ _ _ _ _ _ _ _, and its complementary angle is _ _ _ _ _ _.

Answer: 48 28', 138 28'

5. As shown in Figure 2, find the following angles: ≈1= _ _ _ _ _ _ _ _ _ _, ≈ 2 = _ _ _ _ _ _ _ _ _, ≈3 = _ _ _ _ _ _ _ _.

Figure 2

Answer: 62.5,25 130.

6. Two straight lines intersect, and there are _ _ _ _ _ _ _ _ intersections; Every two of the three straight lines intersect the largest _ _ _ _ _ _ _ _ and the smallest _ _ _ _ _ _.

Answer: and only one, three, one.

7.38 12′=_____________ ,67.5 =__________ ___________′.

Answer: 38.2, 67, 30

8. If x2-3x = 1 is a linear equation about x, then a = _ _ _ _ _ _ _ _ _ _ _ _

Answer:

Second, multiple-choice questions: (3 points for each small question, ***24 points)

9. Of the following statements, the correct one is

A.| A | is not a negative number B.-A is a negative number.

C.-(-a) must be positive. D. is not an integer.

Answer: a.

10. There are any three points on the plane. Draw a straight line through two of them, and you can draw * * *.

A. One straight line B. Two straight lines C. Three straight lines D. One or three straight lines

Answer: D.

1 1. Of the following drawing statements, the correct one is

A. draw a ray op = 3 cm B. connect point a and point B.

C. draw the midpoint between a and B. Draw the distance between a and b.

Answer: B.

12. The following figures can be folded into cubes.

Figure 3

1。

Answer: D.

13. The following figure is obtained by rotating the left figure around the straight line L.

Figure 4

Answer: D.

14. Figure 5 is a statistical map of crops in a village, in which the proportion of rice is

Figure 5

A.40% B.72% C.48% D.52%

Answer: C.

15. The following statement is correct.

① All right angles are equal; ② All complementary angles are equal; ③ The complementary angles of equal angles are equal; ④ Equal angles are right angles. Among them, the correct one is that

A.①② B.①③ C.②③ D.③④

Answer: B.

16. If | x-|+(2y+ 1) 2 = 0, the value of x2+ y2 is

A.B.

C.- D ...

Answer: B.

Third, answer the following questions

17. Calculation problem (3 points for each small question, *** 12 points)

( 1)(- )×(- 1 )÷(- 1 ) (2)32÷(-2)3+(-2)3×(- )-22

(3)( - )÷( - )2÷(-6)2-(- )2

(4) 1 ×〔3×(- )2- 1〕- 〔(-2)2-(4.5)÷3〕

Answer: (1)-1(2)-2 (3)-(4)-

18. Solve the equation: (5 points for each small question, *** 10)

( 1)〔x-)-8〕x+ 1

(2) - - =0

Answer: (1) x =-(2) x =-

19.(6 points) As shown in Figure 6, it is known that AOB is a straight line, OC bisects ∠ AOD, ∠ BOD = 50, and the degree of ∠AOC is found.

Figure 6

Answer: 65

20.(6 points) The complementary angle of an angle is 3 times larger than that of this angle 18. Find the degree of this angle.

Answer: 36

2 1.(6 points) Make an appropriate statistical chart to represent the data in the following table:

After the previous population censuses in China 1949

Year1953196419821990 2000.

Population (billion) 5.946.9510.081.3412.95.

Answer: You can make a bar chart (abbreviated).

22.( 12 minutes) The bus is 200 meters long and the truck is 280 meters long. They travel in opposite directions on parallel tracks. It takes 18 s from two cars meeting to two cars leaving each other. As we all know, the speed ratio of passenger cars to trucks is 5: 3. How many meters do two cars travel per second?

If the speed of the bus is 5x, the speed of the truck is 3x.

18(5x+3x)=200+280。

X=, that is, the bus speed is m/s and the truck speed is10 m/s. 。

References:

/question/4297 1029.html？ si=9

] seventh grade final math review questions

(Full score 100, 90 minutes to complete the paper)

1. Multiple choice questions: (3 points for each small question, ***24 points)

1. where,-,3. 14, 2+,-,0, 1.2666 …, the number of irrational numbers is ().

A.3 B. 4 C. 5 D.6

2. If A-3 B.X.