1. Xiaohua's father can cut off five of his own nails in 1 minute. How many nails can he cut in five minutes?
Xiaohua took 50 yuan's money to the store and bought a car worth 38 yuan, but the salesman only gave him 2 yuan money. Why?
It takes three minutes for three children to eat three cakes, and how long does it take for ninety children to eat ninety cakes?
4. There are two blind people. They all bought two pairs of black socks and two pairs of white socks. Eight pairs of socks are all made of exactly the same cloth and size, and each pair of socks is connected with trademark paper. Two blind people accidentally mixed up eight pairs of socks. How can each of them get back two pairs of black socks and two pairs of white socks? (30 seconds and 30 minutes)
Fill in the blank:11235 _ _134.
6. What word is universal?
7. There are two unevenly distributed incense, and the burning time is one hour. What method can you use to determine the time of 15 minutes?
8. The canteen brought back 70 baskets of Chinese cabbage and radishes, with more radishes than Chinese cabbage 18 baskets. Then, the Chinese cabbage () basket and the radish () basket were brought back.
9. A house has four corners, one corner has a cat, and there are three cats in front of each cat. How many cats are there in the room?
10. The house has four corners. There is a cat in a corner. There are four cats in front of each cat. How many cats are there in the room?
1 1. There is a row of trees along the road in the park, and the distance between each tree is 3 meters. What is the distance between the first tree and the sixth tree?
12. 1 yuan can buy a bottle of soda. After drinking soda, two empty bottles can be exchanged for one. Q: If you have 20 yuan money, how many bottles of soda can you drink at most?
13. The topic is like this: 1=5 2=25 3=75 4=2435 Q 5=?
14. Please move only one number to make 62-63= 1 hold.
15. Fill in the blank: 1247 _ _ 1622
Fill in the blank:11/21/31/4 _ _1/61/7.
17. The highest mountain in the world is _ _ _ _ _, and its height is _ _ _ _ _.
18.6 The horse pulled the cart and ran six miles. How many miles did each horse run? How many miles did six horses run at a time?
19. In ancient China, the mathematician who calculated pi to 7 decimal places was _ _ _ _ _, and its value was _ _ _ _.
20. The square of the hypotenuse in a right triangle is equal to the sum of the squares of two right-angled sides, which is called the _ _ _ theorem, and it is also called the Pythagorean theorem abroad.
2 1. Fill in the blanks with numbers: 3 6 12 _ _ 48 96
22. Goodbye, Mom. Type a common math noun.
23. I will do a few things next week, such as buying books, watching exhibitions, paying the house fee at the bank and seeing a doctor. Bookstores are closed on Tuesdays, banks are closed on Saturdays and Sundays, exhibition halls are closed on Tuesdays, Wednesdays and Fridays, and hospitals are open on Tuesdays, Fridays and Saturdays. When can I go out and finish everything in one day?
24. What mark can be added between two numbers 2 and 3 to get a number greater than 2 and less than 3?
25. 18, 20, 23, 28, 35, _ _ _ _ Please fill in the appropriate number A 42 B 46 C 48 D 5 1 in the horizontal line.
26.a is 5 km away from the school, and B is 10km away from the school. How many kilometers are a and b apart?
27.5,4,3,2, 1 Type a mathematical expression.
Answer:
1.20, including fingernails and toenails.
2. Because he paid the salesman 40 yuan, he only gave him 2 yuan;
In three minutes, 90 children eat at the same time.
4. Take apart each pair of socks, one person takes a pair, and there is no difference between left and right socks. Finally get back two pairs of black socks and two pairs of white socks.
5.8
6. Arabic numerals
7. No matter which end you start from, it takes 1 hour to burn completely, so it takes half an hour for both ends to burn at the same time, but the last burning place is not necessarily the middle of the incense. Therefore, both ends of the first root and one end of the second root ignite at the same time. The first one will take half an hour to burn. At this time, the other end of the second root was ignited and the time began. It takes 15 minutes to burn it all.
8.26; Forty-four
9.4;
10.5;
1 1. 15m；
12.*** You can drink 37 bottles;
13.5= 1
14.62=63- 1
15、 1 1
16. 1/5
17. Everest; 8844.43 (May 22, 2005, China State Bureau of Surveying and Mapping); 8848. 13( 1975 China)
18.6 plum, 36 plum;
19. During the Southern and Northern Dynasties (the second half of the 5th century), Zu Chongzhi was 3. 14 15926 earlier than the Europeans.
20. Pythagorean theorem.
2 1.24
22, denominator
23.friday
24, decimal point
25、46
26, 5km to15 km; (5, 15)
27. Countdown the seconds