1, the first term and the last term of the ratio are multiplied or divided by a number, and the ratio remains unchanged. ( )

2, processing a part, the master takes 8 minutes, the apprentice takes 10 minutes, and the apprentice is 20% slower than the master. ( )

A circle has four symmetry axes. ()

The longest line segment in a circle is the diameter. ( )

When the ratio of male to female is 2: 3, the number of boys accounts for 40% of the total number. ( )

6. The radius of a big circle is twice that of a small circle, so the circumference and area of a big circle are twice that of a small circle. ( )

7. If the ratio of three internal angles of a triangle is 2∶3∶4, then the triangle must be a right triangle. ( )

The original price of 8.80 yuan dropped by 25% at first, and then increased by 25%. The current price is still in 80 yuan. …( )

Second, be a qualified citizen, choose carefully and put the serial number of the correct answer in brackets. 4 points

1 and 100g sugar water contain 25g sugar, and the ratio of sugar to sugar water and sugar to water are () respectively.

A, 1: 4 and 1: 3 B, 1: 4 and 1: 5 C, 1: 5 and 1: 4 D, 1: 5 and/kloc.

2. After the number of a gymnastics team increased, it decreased again, and now the number is compared with the original ().

A, increase B, decrease C, constant D, uncertainty

3. Take a coin and throw it up at will 100 times. After landing, the ratio of positive and negative time is most likely to approach the ratio of which of the following. ( )。

a、4∶ 1 B、9∶ 1 C、3∶7 D、 1∶ 1

4. Draw the largest circle in a square, and the area of this circle is the area of the square ().

a、B、78.5% C、D、

5. Comparing 7× and 7, the result is: ()

A, the meaning is the same, but the calculation rules are different. B, the meaning is different and the calculation rules are the same.

C, meaning and calculation rules are the same D, meaning and calculation rules are different.

Divide the reciprocal of 6 by the reciprocal of 5, and the quotient is ().

A. The 7th day of the 5th year BC

7, a batch of parts, do alone, a 6 days to complete, b 12 days to complete, two people do () days to complete.

A. 12

8. The radius of the great circle is just the diameter of the small circle, so the area of the small circle is the area of the great circle ().

A.B. C. D。

Third, when you return to the "little doctor", fill it out carefully. 22 points (2 points for the third question, 65438+ 0 points for each other question)

1, 40 kg = ton; Hours = () minutes; 100 is 75; 25 tons is 30% of () tons;

200 kg minus 12.5% is () kg; 12% If the number exceeds 25, it is ().

2. One kilogram of soybean can squeeze out one kilogram of oil, 1 kg of soybean can squeeze out one kilogram of oil, and it takes one kilogram of soybean to squeeze out 1 kg of oil.

3, 3.5 = () ÷ 6 = = () Percentage = (): () The simplest ratio.

4. The number A is the number B, the ratio of the number B to the total number of Party A and Party B is (), and the difference between the two numbers is equivalent to the number B. ..

5. fill in ">", "

× ○ 1÷ ○ 1× ÷0. 1○ × 10

6, 8 tons of coal, used, then used tons, A * * * used () tons.

7. It takes 65,438+05 hours for Party A to walk a certain distance, and 65,438+00 hours for Party B.. The simplest walking time ratio of Party A and Party B is () and the walking speed ratio of Party A and Party B is ().

8. "A canal has been repaired, and there are still 240 meters left to be repaired. How many meters is this canal? " The equivalent relation of this problem is ().

9. "Li Qian deposited 500 yuan's lucky money in the bank, and the bank paid Li Qian 5 1 1.25 yuan (including interest tax) when withdrawing money one year later." In the question, the principal is () yuan, the interest is () yuan, and the annual interest rate is ()%.

Fourth, I can draw and count. 6 points (2+4)

1. Draw the symmetry axis of the figure below. 2. Find out the perimeter and area of the picture below. (Unit: meter)

Fifth, when you return to Zhuge Liang, you should check it carefully after reading it! 30 points (4+ 18+8)

1, write directly.

÷ = 0× = ÷ = 1+ =

× = ÷ = × = ÷ =

2. How to calculate the following questions as simple as possible?

+ × ÷2 [ 1-( + )]÷ ( + - )×24

3 14×3 1.4+628×68.6+68.6×686 × + ÷4 2- ÷ -

3. Column calculation.

(1) What is the sum of a number multiplied by?

One number is 80. What is the number?

6. I am good at solving problems. 34 points [4+4+24(4+4+6+6+4)]

1, only column types are calculated, not calculated. "Xiao Ming read a story book. The first day, he read 30 pages. How many pages did he read the next day? "

(1) The number of pages read the next day is the first day ();

(2) I can't see () the next day;

(3) I read more pages the next day than the first day ();

(4) is the number of pages read the next day ().

2. Look at the picture, the formula is not worked out.

⑴ ⑵

Line: line:

3. Answer the following questions.

(1) The number of comic books in the library belongs to science and technology books, and the number of story books belongs to science and technology books. There are 90 comic books known. How many story books are there?

(2) In the figure below, the square with the radius of the circle as the side length has an area of 75 square centimeters. Find the area of a circle.

(3) A section of road is 30 kilometers long, and it takes 10 days for Team A to maintain alone, and 15 days for Team B to maintain alone. How many days can the two teams fix it together?

(4) There are 56 students in Class 4 (5) in this school, and the number of girls is the number of boys. How many boys are there? (Answer in two ways)

5] A company is operated by a four-share partnership. At the end of the year, the company realized a net profit of 7 million yuan and paid dividends by shares. Calculate how much each shareholder should get at the end of the year and fill in the table below.

Shareholders, shareholders, shareholders, shareholders, shareholders, shareholders, shareholders.

Shares (shares) 20 10 18 52

Profit (ten thousand yuan)

Additional questions: 20 points (5+5+5+5)

1, a knitting group, originally 30 people 10 days to produce 1500 cymbidium plants, now 50 people have been added. According to the original work efficiency, how many days does it take to produce 6000 orchids?

.2. Two cars, A and B, leave from A and B respectively at the same time. When A traveled three-sevenths of the whole distance, B traveled 36 kilometers. When A arrived at B, B walked seven-tenths of the distance. How many kilometers is it between AB and B?

3. For a job, it takes 36 days for Party A and Party B to cooperate, 45 days for Party B and Party C and 60 days for Party A and Party C to cooperate. A How many days does it take to do it alone?

4. Two baskets of apples * * * weight 1 10 kg. Now we take out a basket of apples, another basket of apples, and give 25 kilograms to the children. The first basket once had a kilo of apples.

I have a math question bank. I can give it to you if you want.