Mathematical thinking training for primary and middle school students
1, find the rules for filling numbers: 4,8, 12,16,20, (), ()
3、 1、6、2、 12、3、()、()
2, a two-digit number, the sum of the number on the ten-digit number and the number on the one-digit number is 10, if the sum of these two digits. When swapping places, the number obtained is 36 less than the original number, and this two-digit number is ().
There are ***80 books on two shelves. Take eight books from the first shelf and put them on the second shelf. The number of books on the two shelves is equal. It turns out that there are () books on the first shelf.
4. There are 10 red beads and 10 black beads in the pocket. Now take at least () beads out of your pocket and make sure that the two beads are the same color.
A car goes from Nanjing to Shanghai, stopping at Zhenjiang, Changzhou, Wuxi and Suzhou along the way. The railway department should prepare () different tickets for this train.
6. Grandpa is 74 years old. 10 years ago, his age was eight times that of his grandson, and this year he is () years old.
7. 1 Bottle of oil weighs 600g, half of the oil is eaten, and the bottles are weighed together, leaving 450g. There was () grams of oil in the bottle.
8, a cup of milk, Xiaomei first drank half a cup, filled the cup with cold boiled water, drank half a cup, and filled it with cold boiled water. Finally, Xiaomei drank it all and asked her to drink () a glass of milk.
9, 1 ~ 9 these 9 numbers, take two numbers at a time, the sum of these two numbers must be greater than 10, there are () ways to take.
10. An insect, from larva to adult, grows 1 times every day. 16 days can be 40 mm long and 20 mm long, and it takes () days.
Mathematical thinking training for grade 22 and grade 22 pupils
1, there are 12 children playing the game of "cat and mouse", and 7 people have been caught. () Do you still need to catch one person? 2. All the 10 fluorescent lamps in the classroom are on. Now turn off the two fluorescent lights. How many fluorescent lamps are left in the classroom?
A rectangle has four corners. Cut off one corner and there are () corners left. You can think of ().
4、○+△=26,
△+△+○=65,
△=()、○=()。
The hunter went hunting. His home is 8 kilometers away from his destination. I found that I didn't bring it when I was 3 kilometers away from home, so I went home to get it. How many kilometers did the hunter walk before he finally reached his destination?
6. Xiaoming, Xiao Liang and Xiaogang play table tennis. Xiao Ming played five games, Xiao Liang played four games and Xiao Gang played three games. How many games did the three children play together?
7. Xiaohong, due to carelessness, mistook an 8 with several numbers for a 3 and a 6 with hundreds of numbers for a 9, and got a sum of 438. What is the correct sum? (writing process)
8. Xiao Ming wrote 3 in the minuend as 5 and 6 in the decimal system as 0, so the difference is 189. What is the correct difference? (writing process)
9. ○+○ =15, ○+△ = 19, and find △-△ = ()
10, with two 5s and two 0s to form a four-digit number. This number is () when zero is not read, and () when only zero is read.
Mathematical thinking training for the third and second grade students in primary school.
There are 8 pears in 1 and 1kg, and the ratio of 1kg apples to 1kg pears 1kg. My mother bought 2 Jin of pears and 2 Jin of apples, as well as apples and pears (). 2. A snail climbed 25cm forward,15cm backward,10cm forward, and finally climbed () cm forward.
Xiao Ming wrote five big characters on the first day, and every day after that, he wrote two more big characters than the day before. Six days later, Xiao Ming wrote ().
There are six empty seats on the bus. When the bus arrived at Unity Station, no one got off, but nine people got on, and there were two seats left. Among those who got on the bus, there were () people standing.
Both boxes of apples weigh 40kg. After taking 8 kilograms from the first box to the second box, the second box is () kilograms more than the first box.
6. Eight colored flags are inserted on the right side of the school gate, and the distance between each two colored flags is 2m, and there is () m between the 1 colored flag and the 8th colored flag.
7. For a three-digit number, the number on the tenth digit is 9, which is exactly three times that of the single digit. The sum of three digits is 13. This three-digit number is ()
8. Dongdong is 10 years old, and his father is 40 years old. When Dongdong was () years old, his father was exactly twice as old as Dongdong.
Xiaoming planted five trees. Everyone in Daqiang, Li Wei, Dahua and Dongdong planted as many trees as Xiaoming. They planted () trees one by one.
10, on Sunday, Xiaogang boiled water and made tea at home. Washing teapot: 1 min, boiling water: 15 min, washing teacups: 1 min, and taking tea leaves: 2 min. Q: Xiaogang needs at least () minutes to make tea.
Mathematical Thinking Training for Grade Four and Grade Two Pupils
1. When an alien came to the earth, he took a coin with 1, 2, 4 and 8 cents. If he wants to buy a commodity with 70 cents, how should he pay? 9 points, 10 points, 13 points, 14 points, 15 points? How will he pay? 2. The sum of the weights of Heavy Hair, Ermao and Sanmao is142kg, Heavy Hair is 5kg heavier than Sanmao, and Ermao is 48kg lighter than Heavy Hair and Sanmao. What are the weights of the three brothers?
3. It is known that the price of the table is 10 times that of the chair, and the table is 288 yuan more expensive than the chair. How much is a table and a chair?
4. I went to the store to buy bottled drinks and found that the store stipulated that four empty bottles could be exchanged for 1 new drinks. Bought 10 bottles of drinks. How many bottles can he actually drink?
An ant found a big caterpillar and wanted to carry it back to his home, but he couldn't carry it, so he asked four ants for help, but he didn't carry it yet. Every ant has to find three more ants, but it still can't be lifted; Everyone came back, and each ant found two more ants, and finally carried the big green bug back. So how many ants carry insects?
6. There is a steel pipe with a length of12m. It needs to be sawed into two sections, so that the first section is 2 meters shorter than the second section. How long is each part?
7. With the three numbers of 0, 2 and 8, () different three digits can be formed. (Numbers cannot be reused)
9. Students go to the beach to play. There are 86 students in Grade One and 0/38 students in Grade Two. The number of students in grade three is 37 less than the total number of students in grade one and grade two. How many people went to the third grade?
10, the first group has 9 students, each watering 6 trees.
(1) How many trees were watered in the first group * * *.
The second group watered 50 trees. How many trees did the first group water more than the second group?
Mathematical thinking training of fifth and second grade pupils
1. The caterpillar grows from a larva to an adult and doubles every day. It can grow to 20 cm in 30 days, and it takes () days to grow to 5 cm. 2. Twenty small animals are arranged in a row. The number 16 counted from left to right is just a rabbit, and the number 10 counted from right to left is just a deer. How many small animals are there from deer to rabbit?
Xiao Wei and Xiao Dan live in the same street, and they work in the same school. But every morning, Xiao Wei goes south when he goes to school, and Xiao Dan goes north when he goes to school. Why is this?
The garage starts at 8: 00 every morning and delivers one every 8 minutes. So from 8: 00 to 8: 40, * * * sent () cars?
The weight of an apple is equal to the weight of an orange and a strawberry, and the weight of an apple and an orange is equal to the weight of nine strawberries. Excuse me, the weight of an orange is equal to the weight of several strawberries.
6. A snail climbed 25 cm forward, 15 cm backward, 10 cm forward, and finally climbed () cm forward.
On the first day, Xiao Ming wrote five big characters, and every day after that, he wrote two more big characters than the day before. Six days later, Xiao Ming wrote ().
There are six empty seats on the bus. When the bus arrived at the station, no one got off, but nine people got on, and there were two empty seats. Among those who got on the bus, there were () people standing.
9. Both boxes of apples weigh 40 kilograms. After taking 8 kilograms from the first box to the second box, the second box is () kilograms more than the first box.
10, eight colorful flags were inserted on the right side of the school gate, and the distance between each two colorful flags was 2 meters. 1 There is () meters between the colored flag and the eighth colored flag.