1. Fill in the blanks with a lot of knowledge. Come and fill it out! (20 points)
1 .minus 9 degrees Celsius is recorded as: ()
2. A toothbrush is A yuan, a box of toothpaste is B yuan, a toothbrush is cheaper than a box of toothpaste () yuan, and five toothbrushes and two boxes of toothpaste are * * * () yuan.
The sum of 3.3 times x plus 15.8 is 20. To find x, the column equation is ().
4. A piece of used cotton cloth has () meters left.
5. The law () is used in the calculation of this problem.
6. The reciprocal of the smallest true fraction with denominator of 7 is (), and the reciprocal of 4 is ().
7. The () occupied by an object is called its volume.
8. Fill in the appropriate units.
The volume is about 200 () and the volume is about 100 ().
9. A warehouse is 8 meters long, 3 meters wide and 3 meters high. How many cubic meters of wheat does the warehouse need ().
10.5.65 cubic centimeter = () cubic decimeter
4050 liters = () milliliters = () cubic centimeters.
1 1. After the wood block shown in the figure below is split in two, the surface area of the wood block is increased by () square centimeters.
12. Originally planned to burn 15 tons of coal, actually burned 13 tons of coal, saving coal.
13. A number is 20 and this number is ().
14. The side length of a cubic frame is 3 cm, and it takes () cm of iron wire to make such a frame.
2. Math judge. (Put √ in brackets for the right and × for the wrong) ×)( 10/0)
1.X+5= 12×3 is an equation. ………………………………………………( )
2.0 is the smallest positive number and-1 is the smallest negative number. ……………………………( )
3. The product of the formula is greater than the multiplicand. ……………( )
4. The formulas have different meanings, but the calculation method is the same. ………… ( )
The reciprocal of a number must be less than this number. …………………………………( )
6. Two cubes with the same sum of side lengths must have the same surface area. ………………( )
7. Divide the 3-meter-long rope into 5 sections on average, and each section accounts for the whole length. ……………( )
8. The denominator of a fraction is 100, and the prime factor is 100=2×2×5×5, so it is not a finite decimal. ………………………………………………………………( )
9. If two objects are equal in volume, their surface areas are also equal. ……………… ( )
10. Equation 1.2x = 0. X has no solution, so there is no solution. ……………………( )
I am an expert in calculation. (26 points)
1. Write directly. (8 points)
= 24÷
2. Solve the equation. (6 points)
x÷4.5 = 5.4 6x+9 = 135 14×70-5x = 800
3. Calculate the following questions, and simplify what can be simplified. (12)
4. Small statistician. (10)
The patient's temperature is recorded as follows:
0612180618061218 unit: hour.
June 7th, June 8th, June 9th.
1. This chart is a chart. ( 1)
The nurse takes the patient's temperature every hour. ( 1)
The patient's temperature is the highest and lowest. (2 points)
4. The black line in the figure indicates. (2 points)
5. On June 9th, the patient's temperature was 12. (2 points)
Judging from the temperature, is the patient's condition getting worse or better? (2 points)
5. Observe and think. ( 1 1)
1. Mark the locations of buildings on campus on the map below. (5 points)
(1) south of the school gate of the teaching building150m.
(2) The electronic piano room is 30 southwest of the school gate 100 meter.
(3) The computer room is located at 45 southeast of the school gate 150m.
(4) The library is 200 meters north and south of the school gate.
You are standing 50 meters north of the school gate.
2. Find the surface area and volume of the following objects. (Unit: cm) (6 points)
Dig out two small cubes with side length of 1cm.
6. Mathematics in life.
1. To build a section of railway, Team A will complete it in 30 days, and the working efficiency of Team B is A. How many days will it take for two teams to repair it together?
2. A cuboid oil drum has a volume of 18L, a length of 25cm and a width of 16cm. What's your height? How much iron does it take to make such an oil drum?
There are 3600 students in Forest Primary School. The number of fifth-grade students accounts for the total number of students in the school. Among the students in grade five, there are girls. How many girls are there in grade five?
4. On the right is a fish tank. (Unit: decimeter)
(Ignoring glass thickness)
(1) How much water is there in the fish tank?
(2) If the fish tank is full, how many liters of water will be injected?
(3) Take the fish out of the fish tank, and the water level drops by 0.2 decimeter. How many cubic decimeters are these two fish?