Fill in the blanks.
1 280,500,300 is written as (), rewritten as () million units, rounded to hundreds of millions, which is about () million.
2, 2.08 tons = () kg 2.4 hours = () hours () minutes.
3. Fill in () > or =.
0.38×0.78( )0.38÷( )-4( )-6
4. As shown in the figure, the shaded part accounts for () of this figure. This score is expressed as a decimal () and as a percentage ().
5. Each exercise book is one yuan. After Mr. Wang bought 50 exercise books with this money, he still had X yuan left. Mr. Wang brought () yuan.
6. Congcong walking to school, walking 2.4 kilometers an hour. The ratio of walking distance to time is (): (), and the ratio is ().
7. A toy plane is sold at a 20% discount, which means that the current price is ()% cheaper than the original price. If the original price is 40 yuan, then the current price is () yuan.
8. If the number of boys is the number of girls, then the number of girls is the number of boys (), and the number of boys accounts for () of the class.
9. Fill in the blanks according to the rules.
( 1) 1、 1、2、3、5、8、……、 144、233、( )、……
(2) 1、2、4、8、……、( )、 1024、……
10, rectangular iron sheet, 62.8 cm long and 3 1.4 cm wide. If it is closed into a cylindrical tube, the radius of the tube is () cm or () cm.
Second, judge.
1, Li Hong guessed the riddle correctly, guessed four correctly, and guessed wrong 1, with a correct rate of 80%. ………( )
2. If 4x=3y, then X and Y are inversely proportional. ………………………………( )
3. The volume of a cone is smaller than that of a cylinder with equal bottom and equal height. ……………………( )
4. Cut a 3-meter-long steel bar into 5 sections on average, with each section accounting for the whole length. ………( )
5. All prime numbers except 2 are odd numbers. ……………………………( )
Third, choose.
1. Among the following figures, the number that reads only one zero is ().
a、305800 10b、7 109880c、 107200D、50370
2. In the picture below, the most symmetrical axis is () the first net of the new curriculum standard.
A, rectangle b, square c, equilateral triangle d, semicircle
There is a big tree on campus, almost as high as a three-story teaching building. This big tree is about () high.
A, 3 decimeters b, 9 decimeters c, 3 meters d, 9 meters
4, a rope, used, there are meters left. Compared with the rope used ()
A, the used length b, the remaining length c and the same length d are not comparable.
There are two kinds of meat and three kinds of vegetables in the canteen, and now it is required to match one kind of meat and two kinds of vegetables. Different collocation methods * * * have ().
A, 2 kinds of B, 3 kinds of C, 5 kinds of D, 6 kinds.
Fourth, calculation.
1, a number written directly.
258+47=20-7.2=0.84÷0.6=0.85×0.5= 1 - =
+=×=÷=+0.2= 12×(-)=
2. Solution ratio or equation.
X+2.8=42.5:X=0.6:3
3, calculation, you can use a simple method to calculate.
540÷ 18×2.4(+)÷++ 1.85++7. 15
18÷2.5-2.5×0.645×+3.5×45+45× 1.4+(-)÷
Verb (abbreviation for verb) operation and calculation.
1, (1), draw the following points and connect them in turn into a closed figure. A(5，4)b(2，2)c(5，2)
(2) Draw a graph with a magnification of 3: 1.
0 123456
There are eight balls in the pocket. Please draw several black balls, so the possibility of touching the black balls is.
3. The situation of collecting waste batteries in the sixth grade classes of a primary school is as follows:
Six classes (1) six (2) six (3) six (4) six (5) six (6)
Nodes 91215171837
The median of this set of data is (), and the average is (). I think it is expressed by ().
Explain that the general level of this set of data is still appropriate.
4. The picture on the right is a plan of a circular flower bed drawn at the scale of 1:500.
Measure the relevant data (in whole centimeters) and work out the actual area and perimeter of this flower bed.
Sixth, comprehensive application.
1, only column types are calculated, not calculated.
(1) There are 354 girls in bright primary school, 78 more than boys. How many students are there in the school?
(2) 360 kilograms of soybean can extract 48.6 kilograms of oil. How many kilograms of soybeans does it take to extract 243 kilograms of soybean oil?
(3) The trucks and buses start from Party A and Party B at the same time and travel in opposite directions. Trucks travel 76 kilometers per hour and buses travel 84 kilometers per hour. 4.2 hours later, they met. How many kilometers is it between A and B?
2. Two road repair teams of Party A and Party B built a road with a length of 1 1.7 km. Team A builds 1.8 m every day, and after four days, the remaining routes are completed by team B. Team B repairs 1.5km every day. How many more days will it take?
Xiao Qiang can run 300 meters per minute after long-distance running training, which is more than before training. How many meters does Xiao Qiang run per minute before training?
4. The raw grain ratio of granary A and granary B is 5:6. After warehouse A has shipped 18 tons of grain, it belongs to warehouse B. How many tons of grain does warehouse B have?
5. The taxi pricing method in Jiaxing urban area is: 5 yuan in the first 3 kilometers; 3 km to 6 km, calculated at per km 1.8 yuan; More than 6 kilometers, according to the calculation of 2.7 yuan per kilometer. The distance from Jiaxing city to Jiashan is about 2 1 km. According to the above pricing method, how much does it cost to take a taxi from Jiaxing to Jiashan?