1, two bags of rice are the same weight, the first bag is used, the second bag is kg, and the rest ()
A. the weight of the first bag B. the weight of the second bag C. the same weight D. uncertain
2, the following scores, can be turned into a limited score is ().
A.B. C. D。
3, a number (except zero) divided by, this number is ().
A. Enlarge 9 times B. Reduce 9 times C. Increase 9 times D. Reduce 9 times
4.10g salt is dissolved in100g water, and salt accounts for () of brine.
A B C D
5. "The original price of a product is 50 yuan, and the current price is lower than the original price by 5 yuan, so how much is it reduced?" The correct formulation to solve this problem is ().
A B C D
6, the following calculation is correct ()
A B C D
7. The figure with the least symmetry axis is ().
A, circle b, rectangle c, square d, equilateral triangle
8, in the following formula, the biggest result is ()
A. 14×b . 14 \u c . 14
9. The square is the observation point, and the school is 30 northwest. The correct one in the picture below is ().
A.b.c.d has no answer.
10, add hundreds of semicolons after the number a (A is not equal to 0), and this number is ().
A. expand 100 times B. shrink 100 times C. unchanged
Second, fill in the blanks.
(1),: 20= =80%=20÷ = (fill in decimal places)
(2) A circle has a radius of 3cm, a circumference of cm and an area of cm2.
(3) The simplest integer ratio of 2.4 to 4.8 is, the ratio is.
(4) 16 is ()% of 20, and 20 is ()% more than 16.
(5), 45 points = (), tons = () kg.
(6) On a certain day, 49 students in a class arrived at school on time, and 1 student asked for leave. The attendance rate that day was ()%.
(7), the ship is limited to six people, the ship is limited to four people, 38 people * * * rented eight boats, all full. A chartered boat.
(8), in the department chart, the sum of the percentage of all departments is ().
(9) Fill in the numbers according to the rules: 1, 2,4,7, 1 1,16,22, ().
(10), 48 is; It's 27.
(1 1), the reciprocal of 80% is (), and the reciprocal of 1 is ().
(12), 3,3,333%, 3.3, the largest is the smallest.
Third, I am a little judge. (Tick √ for the right and × for the wrong)
(1) and the latter item of 4: 5 should be tripled, and the former item should be tripled, keeping the ratio unchanged. ( )
(2) A circle with a radius of 2 cm has the same circumference and area. () (3) If there are more boys than girls, then there are fewer girls than boys. ()
(4) A batch of cloth used 40%, leaving 60% rice. ( )
(5) Li Jiamin did 50 questions, and each question was correct, with a correct rate of 50%. ( )
Fourth, be careful, I will calculate.
1, a number written directly.
÷ = ×3= 6× = + ×7=
100÷ 10%= ÷ 1= ÷7= ×9× =
2. Calculation of the following problems can be simplified. (8 points)
49 × 15 ÷ 45 ( 15- 14×47 )×82 1
45 ÷[( 13 + 25 )×4 1 1] 27 ×89 +57 ×89
3. Find the unknown number ⅹ. (6 points)
ⅹ+ ⅹ= 15 ⅹ∶ = ∶89
4, column calculation (6 points)
(1) The sum of 56 and 58 is multiplied by a number, and the product is 720. What's this number?
(2) How much is the product of 23 and 35 smaller than 15 of 25?
Comprehensive practice of verbs (abbreviation of verb)
1, draw a circle with a diameter of 4 cm.
Requirements: ① indicate the center of the circle.
(2) Point out what radius is.
(3) Calculate the circumference of the circle in centimeters.
Sixth, solve the problem.
1. Xiaoling took part in the math contest. The total number of questions in the whole volume 18, Xiaoling only got the total right. How many questions did Xiaoling do wrong?
2. During Spring Festival travel rush, after the air ticket price from Shenzhen to Wuhan increased by 10%, the air ticket price was 880 yuan. How much is the air ticket price before Spring Festival travel rush?
3. On an expressway, Team A built 120m and Team B built 2 10m. How many percent did Team B build more than Team A?
4. The circular flower bed of Xicheng Greening Square has a perimeter of 18.84m, and what is the flower bed area?
5. The school choir has 45 members, and the ratio of male to female members is 4∶5. How many men and women are there in the school choir?
6. There are 160 students in the sixth grade. The proportion of students participating in various interest groups is shown in the figure. According to the picture, how many people are participating in various interest groups?
Wisdom Island:
1, the city held a math contest, and * * * gave the question 12. Regulation: Add 10 for each correct question, and deduct 2 points for each wrong question. If you don't do it, you won't get points. Xiaoli finished 12 and got 96 points. How many questions did she answer correctly?
A barrel of oil weighs 23kg. After removing 50% of the oil, it is called 12kg. How many kilograms of oil are there in the barrel? How much does this bucket weigh?
Answers and scoring criteria
I. Selection (each question 1 point, *** 10 point)
1、D 2、C 3、A 4、D 5、A 6、C 7、B 8、B9、C 10
Fill in the blanks (2 points for each question, 24 points for * * *)
Third, judge the question. (65438+ 0 points for each question, ***5 points)
1、√ 2、× 3、× 4、× 5、×
Fourth, I will calculate (24 points)
1, oral calculation (0.5 points for each question, ***4 points)
2. Calculation of the following problems can be simplified. (8 points, 2 points for each question)
3. Find the unknown number ⅹ. (6 points) (3 points for each question)
4, column calculation (***6 points, 3 points for each question. )
Verb (abbreviation of verb) Comprehensive exercise (***4 points) Sketch perimeter: 12.56.
Six, solve the problem (5 points for the first five questions, 8 points for the six questions, ***33 points). 1, 2 questions 2, 800 yuan 3,75 ℅ 4,28.26 square meters 5,20 men 25 women 6, art group 48, singing group 64, science and technology group 40, calligraphy group 8.
Wisdom Island: 10 for each question, ***20 points. 1, 10.2.22kg oil, 1kg barrel.