Su Jiaoban sixth grade first volume mathematics review materials

1, the smallest three digits that can be divisible by 2, 3 and 5 at the same time is ().

2. The average value of three consecutive odd numbers is y, of which the largest is () and the smallest is ().

A steel wire is 3 meters long. Divided into four sections on average, each section is () long, and each section is () of this steel wire.

4. Choose four cards from six cards from 0 to 5 to form two numbers, so that one number can be divisible by another. These two numbers may be () and ().

5. Write a ratio so that the product of their two external terms is 18. For example ().

6. The bottom areas of a cone and a cylinder are equal, the volume ratio is 5: 6, and their height ratio is ().

7. The longest flight time of fighter is 6 hours, and it can fly 2000 kilometers per hour. If this fighter plane starts from the training base, it must return after about () kilometers (without refueling)?

8. On the scale of 20: 1, the diameter of a circular part is 2 cm, and the actual area of the part is ().

9. When two numbers are divided, the quotient is 4 and the remainder is 23. Divider and divisor are reduced by 100 times at the same time, the quotient is (), and the remainder is ().

10, walk the same distance, Xiao Qiang needs 10 minutes, Xiaoming needs 15 minutes, and the simplest integer ratio between Xiaoming and Xiao Qiang is ().

1 1, a barrel of oil weighs 20 kg. After eating for 5 days, I ate ()% on average every day and () kg for 4 days.

12,1360 million eight hundred, writing (), rewritten as () in units of hundreds of millions, and the mantissa after omitting ten thousand is about () ten thousand.

13,2.2 hours: 1 10 minutes. The simplest integer ratio is (), and the ratio is ().

A cube with a side length of 1 decimeter can be cut into at most () cubes with a side length of 1 cm.

15, () hectares =6.7 square kilometers 3 liters 3 ml = () liters.

() minutes = 2 hours 15 minutes 7.27kg = () kg () g.

16, (): 20=20÷( )=( )%= 80%

17. factorization factor: natural number A=2×3×T, natural number B=2×T×5. If the greatest common divisor of A and B is 6, then the least common multiple of A and B is ().

18. Cut a circle into an approximate rectangle and measure the width of the rectangle as 3cm. The diameter of a circle is () cm, and the length of a rectangle is () cm.

19, if 6a+5 = 8, then 3a+5 = (). If 4X=5Y, then y: x = (): (). X and y are proportional to ().

20, natural number w (w > 1) has only two divisors, namely () and ().

2 1, the base angle of the isosceles triangle is 35 degrees, and the top angle is (). This triangle is divided into () triangles by angle.

22, with a length of 12 decimeter wire around a rectangle, when the length and width are integers, there are () cases, the smallest is () square decimeter.

23. On a rectangular piece of paper with a length of 8 decimeters and a width of 7 decimeters, cut off a diameter of 2 decimeters, and at most () disks can be cut off.

24. Make a rectangle with a circumference of 24 cm with two squares of the same size, and the circumference of a square is () cm.

25. There are five tapes, each of which is10cm long, 8cm wide and 2cm high. Please design a most suitable packing method to save paper and wrapping paper () square decimeter (excluding overlapping parts).

26. A manuscript is * * * 5,000 words, and Xiao Qiang typed 40% in 20 minutes. At this rate, it will take him () minutes to finish typing this manuscript.

27. With 12 squares with a side length of 1 cm, you can spell out () different rectangles, of which the smallest circumference is ().

28. Triangles and parallelograms have equal areas and bases. It is known that the height of triangle is 12 cm, and the height of parallelogram is ().

29. Dad is 2.5 times as old as Xiao Ming. The age ratio between Xiao Ming and his father is (), and the ratio is ().

30, a cube with a side length of 8 decimeters, cut it into 8 cubes on average, and the surface area of each cube is ().

3 1, the simplest fraction, numerator plus 8, denominator plus 10, the size of the fraction remains the same, this simplest fraction is ().

32. After cutting a cylinder into an approximate cuboid, the width and height of this cuboid are measured to be 2 decimeters, and the surface area is increased (). The volume of this cylinder is ().

Second, the judgment question

1, the fraction whose numerator and denominator are different prime numbers must be the simplest fraction ().

2. Add 0 or remove 0 at the end of a number, and the size of this number remains the same ().

3. Subtract the minimum multiple from the maximum approximate number of the natural number p, and the difference is 1 ().

The side length of a square is 2 decimeters. If the side length increases by 1 decimeter, the area will increase by 2 square decimeters ().

5. Two ropes with the same length 1 m, one cut off 50% of it and the other cut off 0.5 m, so the remaining ropes are also the same length. ( )

The age ratio between Xiao Ming and his brother was 5:8 last year, but this year their age ratio remains unchanged. ()

7. In proportion, if the product of two outer terms is divided by the product of two inner terms, the quotient is 1. ()

The space of our classroom is about 30 cubic meters.

9. The reciprocal of the real score must be greater than 1. ()

An isosceles triangle with an angle of10.45 must be a right triangle. ()

1 1. A rectangular iron sheet with a length of 50 cm and a width of 16 cm can be cut into small square iron sheets with a side length of 5 cm, which can be cut into 32 pieces. ()

12, if 8G=7W, then W:G=8:7 ()

Third, the application problem.

Xiao Qiang made a survey of students who have computers at home. He found that there were 18 people who had computers at home, and 20 people who didn't. Do you know the computer popularization rate of Xiao Qiang?

2. To build an expressway, 45% of the total length has been built, and there are still 2000 meters from the midpoint. What is the total length of this highway?

3. A small conical toy was accidentally dropped by Fangfang into a cylindrical measuring cup with a bottom area of 3 square decimeters and a height of 4 decimeters. He found that the water level had just risen by 65,438+0 decimeter. Can you work out the volume of this small cone toy?

Guoqiang chemical fertilizer plant plans to produce 2.5 million tons of chemical fertilizer this year, and as a result, it completed 52% of the plan in the first half of the year. If the output in the second half of this year is as much as that in the first half, how many tens of thousands of tons can it exceed the output?

Two cars leave Liyang for Nanjing at the same time. The express train is 80 kilometers per hour and the local train is 65 kilometers per hour. 1.5 hours later, how many kilometers are the two cars apart?

6. Master Zhang processed a batch of parts. On the first day, he processed 25% of this batch of parts, and on the second day, he processed 15 pieces. The ratio of the parts processed in two days to the total number of these parts is 65,438+0: 3. How many parts are there in this batch?

7. Water consists of hydrogen and oxygen in the ratio of 1: 8. Now there are 4 kilograms of oxygen in the laboratory. * * * How many kilograms of water can be synthesized?

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