1. The following statement is incorrect ().
(a) The acute angle is less than
(b) The obtuse angle is both greater than and less than.
(c) The right angle is greater than the acute angle.
The angle of (d) is also acute.
2. In the following surveys, the data were not collected through sampling surveys ().
(1) In order to know the time when your classmates participate in social practice activities on weekends, two people in each group are selected for investigation.
(2) There are 40,000 graduates in the city taking the senior high school entrance examination. For the analysis of test papers, the math scores of 500 randomly selected candidates are counted.
(c) In order to check the qualified rate of a batch of products, take 1 piece from each box of products for inspection.
(d) In order to know how the whole class finished their homework, the head teacher checked the homework of all subjects in the class.
3. The correct bracket is ().
a-(b-c)=a-b-c (B)a-(b-c)=a+b-c
(C)a-(b-C)= a+b+ C(D)a-(b-C)= a-b+ C
4. As shown in the figure, B, O and D are on the same straight line, so the degree of ∠2 is ().
(A) (B) (C) (D)
5. If A and B respectively represent two unequal numbers, A+B = 7 and A× B = 6, then the numbers represented by A and B respectively are ().
(A) a=2，b=5
(B) a= 1，b=6
(C) a=2，b=3
(D) a=3，b=4
6. The following statement is correct ()
(1) if you cross a straight line or a little outside the straight line, you can and can only draw a vertical line of this straight line; (2) passing through the point A on the straight line L and the point B outside the straight line L to make it perpendicular to the straight line L; (3) The vertical section of this straight line starting from a point outside the straight line is called the distance from that point to this straight line; Draw a line perpendicular to the straight line at a point outside it. The length of the vertical line is called the distance from this point to a straight line.
1 (B)2 (C)3 (D)4
7. If both A and B are cubic polynomials, then A+B must be ().
(a) polynomial of degree six (b) polynomial of degree three
(c) Polynomials with degree not less than 3
(d) Algebraic expressions are used no more than three times.
8. The following statement:
① There is only one straight line at two points; (2) There is a common point, and two equal angles are antipodal angles; ③ The internal angles on the same side are equal, and the two straight lines are parallel; ④ The bisectors of adjacent complementary angles are perpendicular to each other.
The correct number is ().
1 (B)2 (C)3 (D)4
9. In the following statements: ① There is only one intersection point when two straight lines intersect; ② Two straight lines do not necessarily have a common point; ③ The straight line AB and straight line BA are two different straight lines; (4) Two different straight lines cannot have two or more things in common, and the correct one is ().
(A)①② (B)①④ (C)①②④ (D)②③④
10. Symbol of multiplication and product of several rational numbers not equal to 0 ().
(a) It is determined by several factors; (b) It is determined by the number of positive factors.
(c) It is determined by the parity of the number of negative factors; (4) It is determined by the size of negative factors.
1 1. Of the following four propositions, the correct one is ().
(a) Ray AB and Ray BA are the same ray.
(b) Two equal angles with a common vertex are antipodal angles.
(c) There is one and only one straight line parallel to a point outside the straight line.
(d) Two straight lines intersect with a third straight line, and the third straight line is complementary to the inner angle of the side surface.
12. The cylinder in the figure below is ().
(A) (B) (C) (D)
13. The following statement is true ().
(A)3. 14 is not a fraction (b) Positive and negative integers are collectively called integers.
(c) Positive numbers and negative numbers are collectively called rational numbers. (d) Integers and fractions are collectively called rational numbers.
14. Draw a vertical line of the line segment, and the vertical foot is at ().
(a) The endpoint (b) of the line segment is on the line segment.
(c) It is possible to extend the line segment (d) or more.
15. The following statement is true ().
(a) There are three negative numbers greater than -3. (b) A number greater than -2 times 3 is -5.
(c) The number 5 less than 2 is -3; (d) The number 2 less than-3 is-1.
Fill in the blanks (2 points for each small question, 30 points for * * *)
1. Read or, read, and their sum is.
2. A cone is surrounded by _ _ _ _ _ faces, and their intersection line is _ _ _ _ _ _ _.
3.=______
4. The numbers four unit lengths away from the origin on the number axis are _ _, and _ _, and they are _ _ _.
5. Please write the antonym of A _ _ _ _ _
6. There are rational numbers with absolute values equal to 3 respectively, and their sum is.
7. On June 10, 2003, the rover Spirit was launched from Cape Canaveral Air Force Base, USA. Driven by the launch vehicle, it completed 480 million kilometers of interstellar travel in 206 days and nights, and successfully landed on the surface of Mars in 2004 10: 50 on October 4/kloc-0.
8. When two students stand together and compare their heads, they are actually comparing the lengths of two line segments. According to the provisions in the above question, this is a comparison using _ _ _ _ _ _ _ (fill in "method 1" or "method 2").
Ninety-four thousand three hundred is accurate to one decimal place, with significant figures. They are.
10. riddle guessing: plot against the victim: _ _ _ _ _ _. (The answer is related to mathematical knowledge)
1 1. Calculation:
( 1)( 10)×(+ )= ;
(2)( 5.8)×( 1.84)= .
12. Judgment:
( 1)a×(b+c)=a×b+a×c()
(2)a \(b+ c)= a \b+ a \c()
(3)(a+b)÷c=a÷c+b÷c()
(4)a×(b×c)=a×b×c()
(5)a \(b×c)= a \b×c()
(6)a \u( b \u c)= a \u b \u c()
13. The line segment is a figure with limited length, and its _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ can be measured as infinite length.
14.29÷3× =_____.
15. The polynomial is _ _ _ _ _ _ in descending order of the letter X.
Third, solve the problem (4 points for each small question, 40 points for * * *)
1. Calculation:
2.( 1) Write the polynomial as the difference between a monomial and a binomial;
(2) Write the polynomial as the sum of two binomials;
(3) add brackets in the polynomial m4-2m2n2-2m2+2n2+n4:
(1) Combine quartic terms and put them in brackets with a "+"sign in front;
② Combine quadratic terms, put them in brackets, and add "-"before them.
3. Calculate with a simple method
( 1)0-[73+(-2 19)-8 1]; (2)-3+ 12-7+8-3 1-9; (3)-5-5-5-5-5-5-3-3-3-3-3;
(4)0+ 1-[(- 1)-(- )-(+5)-(- )]+|-4|.
4. Calculate how many parallelograms there are in the picture below.
5. Connect the similar items in the following two ellipses with line segments, and fill the combined results in the box behind:
6. If the sum of -2axbx+y is similar, find the value of the polynomial.
7. The measured height of a certain group 12 students is as follows (unit: cm).
162, 160, 157, 156, 163, 164, 169, 153, 16 1, 155, 166, 159
Try to calculate the average height of this group of students by a simple method (accurate to ten)
8. Calculation:
( 1) 17-(-8)÷(-2)+4×(-3);
(2)- 12004-( 1+0.5)× ÷(- )
(3) -9+5×(-6)-(-4)2÷(-8).
(4) -22- [-5+(0.2× - 1)÷(- )]
9. Below is an enlarged view of a cuboid, with letters marked on each face. Please answer the questions as required:
(1) If the B surface is above the polyhedron, which surface is below it?
(2) If E is behind the polyhedron, which face is on it when viewed from the left?
(3) From the right, it is the B side, and from the top, it is the E side. So which side is in front?
10. If necessary, use rounding method to approximate the following figures:
(1)3.425 (accurate to 0.01); (2)0.009459 (accurate to thousands);
(3)34567 (accurate to thousands); (4)234560 (accurate to tens of thousands of digits).
The seventh grade (on) math final examination questions (2) (refer to the answer)
First, multiple-choice questions (2 points for each small question, 30 points for * * *)
1.DD；
2. Direct injury
3. Direct injury
4.C
5.B
6.B
7.D
8.B
9.C
10.C
1 1.C
12.A
13.D
14.D
15.C
Fill in the blanks (2 points for each small question, 30 points for * * *)
1.
2.(2, circle. )
3.-8
4.4, -4, this is the opposite.
5. [Ancient names or Latin modern names of animals and plants]
6.2, 3、3,0
7.4.8× 108
8. Method 2;
9. One thousand, two, four, three
10. Calculation
1 1.( 1) 2; (2) 10.672
12.√×√√××
13. Length, straight line and ray;
14.
15.
Third, solve the problem (4 points for each small question, 40 points for * * *)
1.( 1) 1; (2) 4
2. The answer is not unique, only one is provided: (1);
(2) ;
(3)①(M4-2 m2 N2+n4)-2 m2+2 N2；
②m4-2m2n2+n4-(2m2-2n2)
3.( 1) 227; (2)-30; (3)-45; (4) 10
4.36
5.
6.
7. 160.4 cm
8.( 1) solution: the original formula =17-4-12 =1;
(2) The original formula =-1-×× (-4) =-1-2 =1;
(3) Solution: The original formula =-9-30-16÷ (-8) =-9-30+2 =-37.
(4) solution: the original formula =-4-[-5+(- 1) ÷ (-)]
= -4- [-5+(- )×(- )]= -4-(-5+ )
= -4+5- =
(5) Solution: Original formula =
9.( 1)D； (2)B； (3) Answer
10.( 1)3.43; (2)0.009; (3) 35,000; (4) 230,000 Baidu maps