1. Calculation:

( 1) 7,8, 14, 16,2 1,24,( ),32。 (2) ( 16,7),( 17, 10),(24, 19),( 18, )。 2. If 25× 3× 15+5 = 2005, then _ _ _ _ _ _. 3. The colored lights in the classroom appear in the order of 5 red lights, 4 blue lights and 3 yellow lights, then the 80th color is () and the first color is 65438+. 4+3, 5+6, 6+9, 7+12, ... () = () 5. In order to praise good people, a factory verified one thing, and the factory found four people, A, B, C and D. A said, "B did it." B said, "D did it." C said, "I didn't do it." D said, "B is wrong." Only one of these four people told the truth. Q: This good thing was done by _ _ _ _ _ _ _. 6. Li Zhiming. Li Zhiming said, "I am a journalist." Zhang Bin said, "I'm not a reporter." Wang Dawei said, "Li Zhiming lied." If only one sentence of the three of them is true, then _ _ _ _ _ _ _ _ is a reporter. 7. The sum of the first 2005 integers starting from 1 is _ _. 8. Calculate1-2+3-4+5-6+…+1991992+1993 = ()100-99. 9. If ○+□=6 and □ = ○ +□, then □-○ = _ _ _ _ _ _ _. 10. Odd numbers starting from 1: 1, 3, 5, 7, ... 100 Odd numbers are _ _ _ _ _ _ _. 1 1, application problem: (1), the school bought 3 water bottles and 20 teacups for the first time, and spent 134 yuan, and bought the same 3 water bottles and 16 teacups for the second time, and spent/kloc.

(2) There are 5 1 student in a class, and there are twice as many boys as girls. How many girls are there?

(3) My brother caught 20 more fish than my brother, and my brother is three times bigger than my brother. How many fish did they each catch?

(4) There are ***46 goldfish in two tanks. If you put five goldfish in cylinder A and take two goldfish out of cylinder B, then cylinder B still has three more goldfish than cylinder A. How many goldfish are there in cylinder A and cylinder B respectively?

12, calculation

( 1) 6 12-375+275+(388+286)

(2) 756+ 1478+346-(256+278)-246

13. There are 30 rows of seats in the west stand of a gymnasium, and the last row has two more seats than the previous one. There are 132 seats in the last row. How many seats are there in the west stand of the gymnasium?

14. There used to be 48 more male workers than female workers in a workshop. If two female employees are transferred, the number of male employees is three times that of female employees. How many men and women are there in the workshop?

15, Party A, Party B and Party C * * * produced 163 pieces, and Party B produced 8 pieces more than Party A and 3 pieces less than Party B. How many pieces did Party A, Party B and Party C produce respectively?

16. In the subtraction formula, the sum of the minuend, subtraction and difference is equal to 120, and the difference is three times that of subtraction. Seek differences.

17. Today is Sunday. What day is the 300th day from today?

18, Xiao Qiang and his father are 45 years old. In five years, his father will be four times as old as Xiao Qiang. How old are they this year?

19. Someone needs 120 seconds from the first floor to the sixth floor. If he goes up to the 12 floor at the same speed. How many more seconds?

20. There are 30 chickens and rabbits and 70 feet in a cage. How many chickens and rabbits are there?

2 1. A wooden factory produces 60 tables every day, but in fact it produces 4 more tables every day. As a result, the task was completed one day ahead of schedule. How many desks were originally planned to be produced?

22. Xiaohong makes tea for 2 minutes, boils water for 20 minutes, washes teacups for 2 minutes, 15 minutes buys tea and makes tea for 3 minutes. Xiaohong needs at least (25) minutes.

23. A production team wants to process a batch of parts. It was originally planned to finish the task in 15 days, but actually 50 pieces were done every day. As a result, the task was completed three days ahead of schedule. Actual completion every day (250).

24. If a number is divided by 2, 3 and 5 respectively and the remainder is 1, then the smallest number is (3 1).

25. There are 10 story books, 3 history books and 12 popular science books on the bookshelf. Wang Can Jr. takes a book at random from the shelf, and there are 25 different ways to take it.

26. Lingling is 1 1 years old, and grandpa is 74 years old. In (10), grandpa was four times as old as Lingling.

27. A piece of wood is 2 1 meter long. Saw it into a 3-meter-long section. It takes 6 minutes to saw each section and * * * takes (36) minutes.

28. A key can only open one lock. There are 8 keys and 8 locks, but I don't know which key can open which lock. Try at least (28) times to ensure that all keys match the phase lock.

29. As shown below, five circles are connected, and the numbers in each position are filled in according to certain rules. Please find out the rule and the number represented by x is ().

30. Fill in the six numbers 1, 2, 3, 4, 5 and 6 in the table on the right, and each cell can only have one number, so that the number on the right of each row is greater than the number on the left, and the number below each column is greater than the number above. There are five different ways to fill in * * *. Please write a filling method.

3 1. In the integer from 1000 to 199, the number 1 appears () times?

32. When Fangfang does addition, she regards 9 in one plus digit as 7, and 6 in ten digits as 9. The total result is 20 1, and the correct result should be ().

33. Two Xiaohua Mall can catch two fish in two hours. According to their fishing techniques, if you want to catch 10 fish within 10 hours, you should go to (2) Xiaohua Mall.

Zhao, Qian, Sun, Li and Zhou are five students. They are one year older than Fang, and they are 50 years old altogether. Now Zhao is older than Li. Sun is older than money and younger than Zhou; Money is bigger than Li; Zhou is younger than Zhao; So Sun's age is (10) years old.

35. There are 10 true or false questions in an intelligence test, and 3 points will be deducted for each correct answer, and 2 points will be deducted for each wrong answer. Xiaohong answered 10 only 20 points, and she got it wrong (2). (8) Children share apples. If each child is divided into two apples, there will be 16 apples. If each child is divided into five apples, there will be 14 fewer apples and the child will have (10) apples.

36. Dongfeng Motor Group originally planned to manufacture a batch of high-grade export cars, with a daily output of 18, which will take 30 days to complete. If two more cars are produced every day, it can be completed (3) days in advance.

There are 45 students in Class One, Grade Three, and 47 students in Class Two and Class One, Grade Three. Class 2 in Grade 3 is less 1 person than Class 3 in Grade 3, and there are () people in Class 3 in Grade 3?

38. There are 182 rabbits on a school farm. They are put in two kinds of cages, one is 6 rabbits per cage, and the other is 4 rabbits per cage, which just fills 36 cages. There are (19) cages, and there are 6 rabbits in each cage.

39. My elder brother is three times as old as my younger brother. The elder brother is the same age as the younger brother. The sum of the ages of elder brother and younger brother is 30 years old. Q: How old is my brother now?

40. Many people took part in the labor. Some of them carry earth, and some carry earth. * * * 27 poles and 44 baskets are needed. How many people take part in the labor?

4 1. A, B and C each have several beans. Party A first gives half of its own beans to Party B and Party C; Then b also gives half of his existing beans to c and a; C also gave half of his existing number of beans to A and B; How many adzuki beans do the three of them have?

42. A truck can transport ore 16 times a day in sunny days and only once a day in rainy days. Used for 17 days. * * * Delivery 122 times. How many days has it rained these days?

43. A basket of pears weighs 48 kilograms. After taking out half, there are still 25 kilograms. How many kilograms of pears did this basket contain at first?

44. A kind of grass lotus floating on the water grows twice as big every day. If a pond grows in 10 day, how many days will it take to grow half a pond?

45. It takes three minutes for five cats to eat five mice at the same time. How many minutes does it take for 50 cats to eat 50 mice at the same time?

46. At the end of the semester, Zhou Xiao scored an average of 74 points in Chinese, foreign languages and science. After the math exam results were announced, his average score increased by 3 points. How many points did Zhou Xiao get in the math exam?

47. Beibei reads literature books, reading 25 pages every day for the first 9 days, then reading more pages than the day before 10, and finishing it in 3 days. How many pages does Beibei read on average every day?

48. Jamlom got an average score of 90 in five subjects: Chinese, Mathematics, Foreign Languages, Nature and Geography. If math is added, the average score is 92 points. What's Xiao Qiang's math score?

49. There are 15 chickens and rabbits with 46 legs. How many chickens and rabbits are there?

50. A chicken and a rabbit live in the same cage ***2 1 with 62 legs. How many chickens and rabbits are there?

5 1. Li Ling bought ***20 exercise books with 80 cents and 1 cent, and * * 0 yuan spent 65438+84 cents. How much did she buy back two kinds of exercise books?

52. I bought 20 stamps of 1 min, 8/min and 4/min, with a total value of 65,438+7% for 0 yuan, of which the number of stamps of 1 min equals 8%. How many stamps should I buy for each of these three stamps?

53. The intelligence test has 65,438+00 questions. Every answer gets 10, and every wrong answer gets 2 points. Xiaohong finished 10 and got only 64 points. He answered several questions correctly.

54. Xiangfang District Primary School Mathematics Competition *** 15, 8 points for each question, 3 points for wrong questions, and 76 points for Li Ming * * *. How many questions did he answer correctly?

55. A table, 30 yuan, a chair, 22 yuan. Now buy 14 tables and chairs and pay 392 yuan. How many tables and chairs do I buy?