Mathematics 1 10 is listed in this volume, which takes 70 minutes to complete; The extra 10 points can be included in the score, but the score does not exceed 1 10 points.
1. True or false (1, 6)
The prime factor of 1 is a prime number. (error)
2. The quotient divided by a fraction is greater than the original quantity. (error)
3. A square with four equal sides. (error)
4. Two identical triangles can be combined into a parallelogram. (right)
5, a certain volume of cylinder, the bottom is inversely proportional to the radius and height. (right)
6. 15% salt solution salt means 15%. (error)
Second, multiple-choice questions (2 points, *** 10)
Shantou 1, with a total area of 2064(B)
A, square kilometers c, kilometers.
2, the following formula is formula (c)
a，8 +6 = 14 B，XC，4X +2 = 5 D， 15X
& gt3 is an equilateral triangle (B)
A, obtuse triangle b, acute triangle c, triangle
4. For a wheel that rolls for 4 cycles, the wheel should rotate for 3 cycles b, and the ratio of wheel diameter to wheel diameter is (b).
a，3:4 B，4:3 C，9: 16 D， 16:9
5. It is estimated that the largest of the following expressions 4 is (3).
a、7777×( 1 + 1 / 9)B、7777 \( 1+ 1/9)C、7777 \( 1- 1/9)D、7777×( 1 - 1 / 9)
Fill in the blanks (2 points, ***20 points)
1, a number of 10000 10000 yuan has five remaining digits of 0, and the written number (505000) is rewritten from 10000 units to (50.5).
2 150 minutes =(2.5) hours; 0.24 ton =(240) kg
3, the number 3 and 40. 1. This number is (3.4), which is the reciprocal of (5/ 17).
4. The class size of Grade 6 (1) was 200, 10, but it did not survive, and the survival rate was (95%).
The top angle of isosceles triangle is 90, which is an angle (45) degrees.
6. At present, the interest rate of one-year time deposit is 2.25%, and the principal and interest that grandma often gets from the bank with 40 thousand yuan will expire in one year (excluding interest income).
7. Bold letters 1m, 2n, 3o, 4p, and the symmetry axis is (①, ③) (fill in numbers).
8, A, B meters away now kilometers, the car from point A to point B, the speed of 85 kilometers per hour, n hours, Formula racing from point B means (M-85N) kilometers.
9, arranged in a three-digit number 8, 5, 0, making it even, so it is a three-digit number (3).
10, and the number of vacancies legally filled: 3/7 of 65438 (6/13, 2/5, 4/9, 5/ 1 1,
Four. Calculation (28 points)
1, due to the use of direct writing (test paper 1, 8 points)
4-4÷2 = 2 1/2- 1/4 = 1/4 0. 125×2.5× 8 = 2.5
0.4× 0.4 = 0.163/8×13/5 =1.97556/1× 0 ÷ 0.935 = 0.63 ÷.
10:3 = X:0.9 1/2×(X-3)= 3
Solution: X = 3 solution: X = 9
3. Reasonable and flexible calculation (3 points for each question, *** 12 points)
27 - 13/ 17 - 4/ 17 6.6÷ 1.5 - 1.5×0.8
= 27- 1 = 4.4- 1.2
= 26 = 3.2
(3/4-3/8)× 16 7.8÷[( 1/3÷ 0.75)×2 4/ 10]
= 3/4× 16-3/8× 16 = 7.8÷[( 1/3÷3/4)×2 4/ 10]
= 12 - 6 = 7.8×(4/9× 12/5)
= 6 = 7.8× 128, 45 points in total.
= 9984 divided by 450.
4. Column calculation (4 points for each question, *** 12 points)
What is the difference between the quotient division of (1)6.4 0.36 minus 14?
6.4÷ 14-0.36
= 3 times 16/35-9/25
= 65438+7/075
(2) If a batch exceeds 28 5/7 4, find the number (by equation).
Solution: let the number be X.
3X-4 = 28×4/6
3 times = 20 +4
X = 8
(3) Find the area of the shaded part in the figure below (figure numerical unit: cm).
Five, the application problem (paper 6 points, ***36 points)
1, the per capita disposable income of residents in the west of a city in 2005-2008 was lower than the surface. Fill in the blanks:
(1) This graph is called a chart.
(2) The average annual per capita disposable income of urban residents in four years is RMB.
(3) Since 2008, the per capita disposable income has increased by more than 2005%.
2. A bag of 40 kilograms of rice, 20% in the first week, ate 1/4, and there were many kilograms left in the second week?
40×( 1-20%- 1 / 4)
= 40×0.55
= 22 kg
3. 8.4 cubic meters of sand should be placed in a room 4.2 meters long and 5 meters wide. How can it be thick?
8.4÷(4.2×5)
= 8.4÷2 1
= 0.4m.
4. Bind the exercise book with a group of papers of the same size, if 15% reproducible staple food is 240. If each book is 18 yuan, how many books can be bound? (Ratio to solution)
Solution: Let X be the binding.
18 times = 15×240
X = 3600÷ 18
X = 200
5. Cone-shaped coal pile, bottom circumference 12.56 meters high, per cubic meter 1.2 meters. If coal weighs about 1.4 tons, how many tons does it weigh? (Thanks to one decimal place) (12.56 ÷ 3.14 ÷ 2) × (12.56 ÷ 3.14 ÷ 2 )× 3./kloc-
= 4×3. 14×0.4× 1.4
≈ 7.0
6. A city held a contest to name math drivers for the first time this year. The results of the second prize and the third prize have multiple names, among which the total number of one or two second prizes visited is /5, the total number of one or two second prizes is 7/ 10, and more than 45 people won the second prize. How many people are there in each award to win one or two?
45÷(7/ 10-2/5)
= 45÷3/ 10
= 150
150×( 1-2/5)= 90
150×( 1-7/ 10)= 45
150×7/ 10-90 = 105-90 = 15
There are still some questions I haven't found the answer to. You ask me, and I expect it to give you a good answer.