The final quality test paper of the first volume of the seventh grade mathematics department (time: 120, full score 120) has a total score of one, two and three. I believe you can definitely choose the right one! (3 points for each small question, ***30 points) 1. The reciprocal of a number is 2, and this number is () A.B.C.2D.22 If the product of four rational numbers is negative, then there is () A.3B. 1 C.0 or 2D. 1 or 3 3. The distance between Mars and the Earth is about 34 million kilometers. The result of expressing 34,000,000 by scientific notation is () a.0.34×108b.3.4×106c.34×106d.3.4×107.4. The reciprocal of the rational number with the smallest absolute value is b.1c.0d. There is no 5. The equation 3x+2m+ 1 = x 3m 2 has a solution x = 0, and the value of m is () A.B.C.D.6 When a commodity is sold at a price of 190 yuan, let the price of the commodity be one yuan, and the correct equation according to the meaning of the question is () A.B. This year, after 26 rounds of fierce fighting, Wuhan Yellow Crane Tower team won the fifth place in the Super League with 42 points, including 6 defeats, so the winning number was () A.9b.10c.11d.128. The figure below is a geometric figure composed of six identical cubes. The plane figure seen from above is () A.B.C.D.9 The following equation holds () a.83.5 = 83 50' b.3712' 36 "= 37.48c.24 24' 24". d . 4 1.25 = 4 1. 15 ' 1 1 10。 In the formula -A+2A2, the coefficients of the highest term are a, 0 B, 2 C and -65438+. (3 points for each question, ***30 points) 1 1. If Li Bai was born at 70 1, it means +70 1, then Han Feizi was born 206 years before the official year, which means. 12. The number represented by point A on the number axis is 4, and the number represented by point B is 4, so AB = _ _ _ _ _ _ _ _ _ 13. Approximate value 2. 13x103 accurate to _ _ _ _ _ _ _. 14. The ratio of complementary angle to complementary angle of an angle is 2.5. Then this angle is equal to _ _ _ _ _ _ _ degrees. 15. Given that the solution of equation x = 10 4x is the same as that of equation 8x+5m = 1 1, then the absolute value of m = _ _ _ _ _ _. 16. 17. On the number axis, point A and point B represent rational numbers respectively, and the origin O is just the midpoint of AB, so the value of the algebraic expression is equal to _ _ _ _ _ _ _ _ _.18. If singletons are similar, then m+n =; 19. The complementary angle of an angle plus 10 is equal to three times the complementary angle of this angle, so this angle is _ _ _ _ _ _ _ 20. , b, c, d are real numbers, specify the operation, then the value of x is; Third, answer carefully and be careful! (60 points for this question * * *) 2 1. (5 points) Calculation: 22. (6 points) Solving equation: 23. Simplify first, then calculate: (6 points) 2 (A2B+AB2)-[2A2-( 1-A2. Complete the table below according to the information and answer the questions. Names: Wang Fang, Liu Bing, Zhang Xin, Li Cong. The difference between Jiang Wen's score of 89.84 and the average score of the whole class is 65.438+0+202. Who got the highest score among the five people? Who scored the lowest? Whose score is closest to the class average? 25.(6 points) As shown in the figure, the line segment AC = 6 cm, the line segment BC = 15cm, and the point M is the midpoint of AC. Take a little n on CB so that CN \u NB = 1 \u 2. Find the length of MN. 26.(6 points) As shown in the figure, the following figure is an incomplete cubic plane expansion diagram, which needs to be filled in to be complete. Please draw all the methods. 27.(6 points) A literary and art group organized a benefit performance and sold *** 1000 adult tickets and student tickets to raise 5950 yuan. How much are adult tickets and student tickets in 7 yuan and 4 yuan? 28.(6 points) It is known that ∠AOB = 50 and ∠AOC =10, which are the bisectors OM and ON of ∠AOB and ∠ AOC, respectively. Find the size of ∠MON. 29.(6 points) (1) Find the angle between the hour hand and the minute hand on the clock face at 10: 30 in the morning; (2) Between 10: 30 a.m. and 1 1: 30 a.m., when does the hour hand and the minute hand form a right angle? 30.(8 points) Known line segment AB = 6. (1) Take the bisector of line segment AB. How many line segments can these points form together with the two endpoints of line segment AB? Find the sum of the lengths of these line segments; (2) Take two points on the line segment AB: the first is the quartering point of the line segment AB; The second is the sextuple of line segment AB. How many line segments can these points form by adding the bisector in (1) and the two endpoints of line segment AB? Find the total length of these segments. In the final exam of the last semester of the 2008-2009 school year, the seventh grade mathematics reference answers I, multiple-choice questions 1, D 2, D 3, D 4, D 5, A 6, C 7, C 8, D 9, D 10, B.2, fill-in-the-blank questions1/kloc- -20612.7.13.14.30.15.1.16.217. Solution: The original formula =-9-(-8) × (-4 )× (-4) 2 points =-9+ 128 4 points = 1 19 5 points 22. Solution: 2 (2x+ after the denominator is removed. 1)+6 = 3 (x+3) 4x+2+6 = 3x+9.2-6.4 points are merged to obtain x = 1.6 points 23.a2b- 1.4 points, and the original formula is =1. The highest score is Liu Bing, the lowest is Li Cong, and Zhang Xin's score is the closest to the class average. (Each correct question is given 1 point, and all correct answers are given 3 points) 25. Solution: ∵M is the midpoint of AC ∴MC=AM= AC= ×6=3(cm) 2 points ∵ CNNB =12 ∴ CN = BC =×15 = 5. 4 minutes ∴ Mn = MC+NC = 3cm+5cm = 8cm6minutes and 26 seconds. Give 1.5 points for each picture. 27. Solution: If there are X adult tickets, then there are (1000-x) student tickets. According to the meaning: 7x+4 (1000-x) = 5950, x=650 4, 1000-x = 3505. A: 650 adult tickets and 350 student tickets were sold. 6 minutes and 28 seconds. ∠ mon = 80 or 30. (One answer gives 4 points and the other gives 2 points) 29. (1) 135 ... 1 min (2) Set x minutes, and the angle between the hour hand and the minute hand is 90. Equation: … 3 minutes solution: … 4 in 10 or 1 1 answer, the hour hand and the minute hand are at right angles … 5 (the first question 1, the second question 5) 30. (1) Let m and n be the third part of the line segment AB. * * * six line segments (written), the sum of the lengths of these six line segments is 20-4 minutes (2) Let P 1, P2 and P3 be the four demarcation points of line segment AB, and R 1, R2, R3, R4, R5 and R6 be the six demarcation points of line segment AB (the figure is omitted).