25:6.5

3 out of 7:13 out of 4

9: 65438+3/00

1 kg 60 g: 200 g

2. Judge right or wrong. The ratio of 1 in 8 to the simplest integer in 9 is 1. 125. ( )

3. The age difference between mother and daughter is 28 years old, and the age ratio of mother and daughter is 3: 1, so how old is the daughter?

4. How many iron rings can a wire with a radius of 2 decimeters and 20 meters make?

5. The school distributed 200 seedlings, the teacher planted 10%, and the rest were distributed to Class A, Class B and Class C at 5:4:3. How many trees are classified as C?

2. In the "Giving Love" activity, all the students in a class donated books, and the number of books donated was 1. The distribution of donated books is shown in Table 2.

1. Number of books donated by each person: 5, 10,15,20.

The corresponding number of books donated:17,22,4,2.

20% for other classes in our school, 60% for mountain schools and 60% for brother schools in our city (I don't know yet).

(1). How many students are there in this class? How many books did the class donate?

(2) What percentage of books are donated to sister schools in this city?

(3) How many more books are given to mountain schools than to other classes in our school and brother schools in this city? First, fill in the blanks carefully. 32 of 1 and 15 meters is () meters, and 120 kilograms is 4 1 more than () kilograms. 2. 43 of a rope is 12 meters, and 8 1 of this rope is () meters. 3. The number of symmetry axes of equilateral triangles is ()% less than that of squares. There are 50 students in Class 4.6 (1). The attendance rate of the school sports meeting is 98%, and () students participated in the school activities. 5. Starting from June 5438+1 October1in 2006, the personal income tax threshold was adjusted from 800 yuan to 1600 yuan, and the salary in Zhang Yue was 1800 yuan. If he pays tax at 5%, then Zhang should pay tax () yuan every month now. 6、20:( )=( )20 = 45 = 24÷( )=( )%。 7. The time of a class in primary school is 32 hours. If Xiaohong has four classes every morning from 8: 00 a.m. 10, with a break of10 minutes, Xiaohong will finish school every morning. 8. From home to school, Xiaohua walked 38 kilometers in 4 1 hour, and Xiaohong walked 2 1 kilometer in 52 hours. The simplest ratio of Kobanawa Xiaohong's driving time is (), and Kobanawa Xiaohong's driving speed is (). 9. The side length of a square is 20 cm. If you draw the largest circle in this square, then the area of this largest circle is () square decimeter. 10, if you sell 50 yuan for each book, you can earn 25%; If you want to make a profit of 40%, then each book will cost () yuan. Choose carefully, choose carefully, choose carefully, show yourself, show yourself, show yourself! ! ! ! Fill in the number of the correct answer in brackets. Fill in the number of the correct answer in the brackets. Fill in the number of the correct answer in the brackets. . . . )) ((4,444 points)) 1, 54 tons of soybean oil pressed 125 13 tons, how many tons of soybean oil is pressed per ton on average? The correct formula is (). a，54× 125 13 B，54÷ 125 13 C， 125 13×54 D， 125 13 ÷。 A, 32 B, 43rd, 73 D, 74 3, a batch of corn seeds, the ratio of germinated seeds to ungerminated seeds is 4: 1, and the germination rate of these seeds is (). A, 80% b, 75% c, 25% d, impossible to calculate 4, a circular piece of paper with a diameter of 10 cm, if it is cut into an approximate rectangle, then the circumference of this rectangle is about () cm. (π takes 3. 14) A, 5 1.4 B, 4 1.4 C, 3 1.4 D, and none of the above answers is the right choice ((13. The following statement is correct:-. Fractions with prime factors of 2 and 5 in the mother letter can only be converted into finite decimals (c): the size of π has nothing to do with the size of the circle (d): the sector is a part of the circle, so the area of the sector is less than the area of the circle 14. When you throw a dice, the probability that the number 3 is up is-(a): 6 1 It is the wheel's () (a): circumference (b): diameter (c). Then their area -() (a): round (b): square (c): equally big (d): impossible to judge 17. A dress costs 560 yuan and 400 yuan. The profitability of this dress is () (a): 71.4 ~ (b): 28.6 ~ (c): 7.4 ~ (d): 40 ~18. Then the area -() (a): as big as before (b): expanded to triple (c): reduced to 365,438+0 (d): expanded to nine times. 26. Lao Zhang borrowed money to buy a house and borrowed 250 thousand from the bank. As we all know, the annual interest rate of bank loans is 6.2%. 27. A shop sells a pencil box with a unit price of 20 yuan. Now there are two preferential ways. Discount 1: 20% discount for all units; Offer 2: buy three, the first original price, 30% off the second original price, and 6.5% off the third original price. Now I'm going to buy three pencil boxes. Which preferential method is cost-effective?