1, a suit, coat 840 yuan, pants 2 10 yuan, the price of pants is ()% of the coat, and the price of coat is ()% of this suit.

2. It takes Party A 20 minutes and Party B 16 minutes to get from the school to the Cultural Palace. B's time is less than A's ()%; B is ()% faster than a block.

3. () 60% of the kilometers are 3 kilometers; 20% () tons less than 40 tons.

4. The ratio of A number to B number is 5/2, B number is less than A number ()%, and A number is greater than B number ()%.

5. The sales in May increased by 15% compared with that in April. The sales in May were equivalent to ()% in April, and the sales in April were less than ()% in May.

There is a 20% discount on amusement park tickets during June 1 day, and the current price is ()% of the original price. All school supplies in children's stationery stores are sold at a 10% discount, saving ()%.

7. 1/5=( )%=( )÷40 =4:( )= () (fill in decimal places)

8. Guangming Hotel has a turnover of 400,000 yuan this year 1 month, which is subject to 5% business tax and 7% urban maintenance and construction tax. Then, this hotel needs to pay business tax () yuan and urban maintenance and construction tax () yuan in January.

9. Dad deposited 20,000 yuan in the bank last year 1 month for two years on a regular basis. If the annual interest rate is 2.5%, he has to pay interest tax () yuan at maturity, and he can get back () yuan after one * *.

10. To build a highway, 40% of the total length was built on the first day, and 37.5% on the second day, leaving180m, which is * * * meters long.

Second, judgment.

1, 100g water plus10g salt, accounting for 10% of salt water. ( )

2. Today, 10 1 parts produced in Li Shifu are all qualified, and the qualified rate is10/%. ( )

30% of 3.3 kg is equal to 3% of 30 kg. ( )

4. A dress is sold at 7.5% of the original price at a discount of 25%. ( )

5. If A is less than B by 20%, then B is more than A by 20%. ()

Third, choose

1, a commodity is sold at a 10% discount, indicating that the price is lower than the original price ().

a、90% B、9% C、 1/9 D、 10%

2. The output of rapeseed this year is 1/5 higher than last year, which is ().

A, this year's rapeseed output is 102% of last year's B. Last year's rapeseed output was 20% less than this year's.

C. The rapeseed output this year is 120% D of last year, and the rapeseed output this year is 100.2% of last year.

3. 25% of the male employees are equal to 30% of the female employees, so the number of male employees is compared with that of male employees ()

A, the number of male workers is more than B, the number of female workers is more than C, and the same number D is incomparable.

4. The price of a tape recorder has dropped from 220 yuan to 120 yuan. What is the decrease? The correct formula is ().

a、 120÷220 B 、( 220- 120)÷ 120 C、220÷ 120 D 、( 220- 120)220

5. On April 5th, wang hong deposited 2,000 yuan in the bank with a monthly interest of 0. 12%. How much after-tax interest will he get by June 5? (After-tax interest is 5%) The correct formula is ().

a、2000×0. 12%×( 1-5%) B、2000×0. 12%×2

c、2000×0. 12%×2×( 1-5%)D、2000+2000×0. 12%×2×( 1-5%)

Fourth, solve the equation

40% X+25% X = 130 1/5X+3/7 = 3/7X

Five, only column type, do not calculate the number of steps.

The school library has 350 science and technology books and 400 story books.

(1) What percentage of science and technology books are story books? (2) What percentage of science and technology books are story books?

(3) What is the proportion of science and technology books less than story books? (4) How many story books are there than science books?

Sixth, solve the problem.

1. A canteen 1 1 month burned 50 tons of coal, saving 5 tons compared with the original plan. What percentage was saved?

2. There are 20% more people in the school math group than in the art group. If there are 30 people in the math group, how many are there in the art group? (column equation solution)

Xiaohua will deposit 4000 yuan in the bank for 2 years. If the monthly interest rate is 0.25%, how much interest can he get after maturity? How much can a * * * get back after paying 5% interest tax?

4, a suit ***320 yuan, the unit price of pants is 60% of the unit price of coat, how much is the unit price of coat more than that of pants?

5. In 2005, China announced the new personal income tax collection standard. 1Personal income below 600 yuan is not taxed. If the monthly income exceeds 1600 yuan, tax shall be paid step by step; if it exceeds 500 yuan, personal income tax shall be levied at 5%; Personal income tax will be levied at 10% for the part exceeding 500-2,000 yuan. Xiaoming's mother earns 3500 yuan a month. How much personal income tax does she have to pay every month?

Other issues

1, reduce one side of the square by 20% and increase the other side by 2 meters to get a rectangle. The area of this rectangle is equal to the original square. So what is the area of the original square?

On the National Day, Cong Cong's mother saw the same sweater in two shopping malls, A and B, which is very suitable for Cong Cong to wear. Original price per piece 120 yuan. However, because of the festival, shopping mall A has a 10% discount, while the price of shopping mall B remains unchanged. Mom feels warm now and decides to buy it later. On New Year's Day, I went to two shopping malls, A and B, and saw that the price of this sweater in shopping mall A was 20% higher than that in National Day, while that in shopping mall B was 10%. Mom wants to buy this sweater now. Which shopping mall is cheaper? How much cheaper?

Fill in the blanks

(1) A soybean contains 4/25 kg of oil per kilogram, and 100 kg of soybean contains () kg of oil.

(2) 1/6 of 5 meters is () meters, and () meters is 1/6 is 5 meters.

The reciprocal of (3) is greater than itself.

(4) My sister is 12 years old this year, which is 2/3 of my brother's age. My brother is () years old this year.

(5) 2/5 of the pen price is equivalent to the book price, where () can be regarded as the unit "1".

(6) The ratio of1.5: 3/4 to the simplest integer is (), and the ratio is ().

(7) The length of a conductor is 14 meter, 2/7 of which is gone, and there are () meters left.

Xiaoming weighs 24 kilograms, which is 3/8 of his father's weight. Please write an equivalence relation according to this sentence: ()

(9) There are 28 boys and 32 girls in Class One of Grade Six, and the proportion of girls in the class is ()

(10) A pesticide is prepared from medicine and water at the ratio of 1: 100. It takes 202 kilograms of water to make this insecticide.

(1 1) A pile of coal is 10 tons, first 2/5 tons, then 2/5 tons, twice * * * tons.

(12) The ratio of AB is 4: 3, A is 20, and the sum of AB is ().

(13)A is 1.25 times that of B, so the ratio of A to B is (), and the ratio is ().

Second, the judgment question

The calculation rules and meanings of (1) 12×2/3 and 2/3× 12 are the same. ()

(2) The meaning of fractional division is exactly the same as that of integer division. ()

(3) The ratio is a number.

(4) Because 1÷A=5/ 16, a and 5/ 16 are reciprocal. ()

Third, the column calculation

How much is the 5/6 of (1) 18 more than the reciprocal of 1? (2) Three fifths of a number is 2 1. What is 2/7 of this number?

(3) The number A is 60, and the number B is 6 more than 3/4 of the number A. What is the number B? (4) Put 20 grams of sugar into 80% water. How much water does sugar water account for?

Fourth, the application questions

(1) Make up an application question according to the picture and then answer it.

(2) A building concrete is made of cement, sand and stone in a ratio of 2:3:4. In order to match 36 tons of such soil, water is needed.

How many tons of mud and sand are there?

(3) The school shipped 18 baskets of peaches and pears. The number of baskets of peaches is 4/5 of that of pears. How many baskets of peaches and pears are there?

(4) There are 729 story books, of which 8/9 are science books and 5/6 are comics. If you buy at least one, how many copies do you need to buy?

(5) Modern Primary School 6 1 Class Wang Mingxue: "The number of sixth-grade students in our school accounts for the whole school 1/5, and the number of fifth-grade students accounts for the whole school 1/6. There are 2 10 sixth graders. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Please add a question to make it a two-step calculation before you answer it.

(6)AB Two cars are driving in opposite directions from two places at the same time. 1.5 hours later, car A travels 70km and car B travels 90km. At this time, the distance between the two cars accounts for 2/5 of the distance between the two places. How many kilometers are the two places apart?

(7) The store sold two baskets of apples, each weighing 24 kilograms, accounting for 6/ 1 1 of the total fruit sold. Pears sold account for 1/4 of the total fruits sold. How many kilograms of pears did this shop sell?