1. At present, the total area of China and Hongkong is1052 million square meters, and the unit of "ten thousand" is rewritten as () square meters, and the mantissa after omitting "hundred million" is about () square meters.
2, 4.25 hours = () hours () minutes, 7 cubic meters and 40 cubic meters = () cubic meters.
3. Cut the 4-meter-long rope into 5 sections on average, each section is () meters, and each section accounts for () of the total length.
4.3 14%, 3. 1, 3.0 14, 3,3, the maximum number is (), and the minimum number is ().
5.()% = 4 ÷ 5 = (): 10 = () (decimal)
6. There are () simplest true fractions with denominator 18, and their sum is ().
7. Glue three cubes 4 cm long together to form a cuboid. The cuboid has a volume of () cubic centimeters, and its surface area is () square centimeters smaller than the original three small cubes.
8, more than 80 meters is () meters, 12 kg is 15 kg ()%.
9. The diagonal length of a square piece of paper is 4 cm, and its area is () square cm. If cut into the largest circle, the area of the circle is () square centimeters.
The ratio of 10 to: is (), and the ratio of 4: 0.8 to the simplest integer is (): ().
The greatest common factor of 1 1, 12 and 30 is (), and the smallest common multiple is ().
12, observe the law of finding examples and answer questions as required.
( 120× 120)-( 1 19× 12 1)= 1, ( 120× 120)-( 1 18× 122)=4,
( 120× 120)-( 1 17× 123)=9,( 120× 120)-( 1 16× 124)= 16,……
( 1)( 120× 120)-( 1 12× 128)= ()。
(2)( 120× 120)-( × )= 144
Second, the judgment question. (5 points)
1, add 0 or go to 0 after the decimal point, and the size of the decimal point remains the same. ( )
2. The volume of the cone is equal to the volume of the cylinder. ( )
3. One ton of coal is 40% used, leaving 60% tons. ( )
Time is fixed, and distance is directly proportional to speed. ( )
5. The price of a commodity first increases by 10% and then decreases by 10%. The current price of this commodity is the same as the original price. ()
Third, multiple choice questions. (6 points)
1, the divisor of two numbers is 2.4. The divisor is enlarged by 100 times, and the quotient is () if the divisor is divided by 0.0 1.
a、2.4 B、24000 C、240
2, said a patient's temperature changes in a day, draw () statistical chart is more appropriate.
A, dotted line b, sector c, bar
3, an isosceles triangle, the ratio of a base angle to a vertex angle is 2: 1, then this isosceles triangle is also ().
A, acute triangle b, right triangle c, obtuse triangle
Xiao Ming walked 20 kilometers in 3 hours, and rode back along the original road just 1 hour. The average speed of Xiao Ming's round trip is () per hour.
A, 5km b,10km c,13km.
5. A project was originally planned to be completed in 5 hours, but the task was actually completed in 4 hours, which improved the work efficiency ().
A, B, C,
6. When estimating 7. 18×5.89, the error is small ().
a、8×6 B、②7×6 C、③7×5
Fourth, the calculation problem. (26 points)
1. Numbers written directly (10 points)
127+38= 8.8÷0.2= 15×3/20= 2/3÷0.5÷2= 13/4+0.25=
2/5÷ 1/ 10= 2/3— 1/4= 2.8—4/7+ 1.2= 3.5×9+3.5= 1.02-0.43=
2. calculation. (12)
9 -(3 +0.4) 1.8× +2.2×25% 5.02- 1.37-2.63
3. Solve the equation. (4 points)
7.5:x=24: 12 3x-6 =8.25
Verb (abbreviation for verb) figure and operation. (8 points)
1, a part, as shown below, find its volume. (4 points)
2. The side length of each small square in the right square is 1 cm. Please draw this picture.
The trapezoid in the shape is divided into three triangles, A, B and C, so their area ratio is
1∶2∶3, and calculate the areas of the three triangles respectively. (4 points)
Sixth, solve the problem. (3 1)
1, only counting the column type, not counting: (2 points for each question, ***8 points)
(1) A factory plans to produce 240 machine tools in 15 days, but in fact, it produces 4 more than planned every day. How many days will it actually take to complete?
(2) The survival rate of a sapling is 95%. How many saplings must be planted at least to ensure 570 saplings?
(3) The store delivered 20 baskets of pears and 0/6 baskets of apples, weighing 820kg. It is known that each basket of apples weighs 22.5 kilograms. How many kilograms does each basket of pears weigh? (Equation solving)
(4) ICBC introduced lump-sum deposit and withdrawal of education savings, and implemented interest tax relief. Xiao Qiang's parents went to the bank to deposit 8,000 yuan as a three-year lump-sum education savings in Xiao Qiang. It is known that the annual interest rate of lump sum deposit and withdrawal for three years is 3.24%. How much principal and interest can I get at maturity?
2. Xiaoming reads a story book. In the first four days, he read an average of 24 pages a day, and on the fifth day he read 34 pages. How many pages did Xiao Ming read every day for the first five days? (4 points)
There is an 80-meter-long water pipe, which used 25% of the total length for the first time, 40% more than the first time. How many meters are left after two times? (4 points)
4. A cylindrical barrel without a lid, measured from the inside, has a bottom diameter of 4 decimeters and a height of 6 decimeters. How many square decimetres of iron sheet does it take to make this barrel? The water depth in the bucket is 5 decimeters. How heavy is the water in the bucket? (1 liter weight 1 kg) (5 points)
The distance between a and b is 264 kilometers. A takes a bus from A to B, with an average of 80 kilometers per hour. B rides a motorcycle from B to A with an average speed of 32 kilometers per hour. A travels 200 kilometers and meets B. How many hours does A have to leave before B? (5 points)
6. One day, Zunyi Evening News published a message: the monthly water fee for each household in a city was changed from per cubic meter 1.90 yuan to:
water consumption
20 cubic meters and below
More than 20 cubic meters
charging standards
2.30 yuan per cubic meter
3.5 yuan per cubic meter
According to the above information, the water fee of the Wangs in May this year was paid to 24 yuan more than before according to the new charging standard. How many cubic meters of water did the Wangs consume in May this year? (5 points)
Independent booth:
1 A cylinder with a bottom diameter of 24 cm is filled with water, and a conical plumb hammer with a bottom diameter of 4 cm is submerged in the water. When the plumb hammer is taken out of the water, the water surface drops 1 cm. What is the height of the plumb hammer?
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