Interesting topic of mathematics in grade two.
1. There are 27 birds on three trees. From the first tree to the second tree, there are 2 birds, from the second tree to the third tree, and from the third tree to the first tree, there are 4 birds. At this time, there are as many birds on three trees. How many birds are there in each tree? 2. Among the three animals, the elephant and the tiger are * * 125 years old, the elephant and the monkey are ***75 years old, and the tiger and the monkey are ***60 years old. Please calculate the ages of these three animals.
3. What is the maximum intersection of eight straight lines?
How many pieces can a pie be cut with a knife?
5. Put 100 oranges into 6 baskets, and the number of oranges in each basket includes 6. Q: How should I install it?
6. 1 triangle can divide a plane into two parts, and two triangles can divide the plane into () parts at most.
7. A triangle has five points on each side and at least () points on three sides.
8. Brother Monkey ran to the mountain with a basket of bananas on his back. It takes him three minutes to walk every five steps, and then he has to rest 1 minute. It took him () minutes to reach the top of the mountain after he walked 45 steps.
9. After Xiaohua gave Xiao Fang eight stamps, they had the same number of stamps. How many stamps does Xiaohua have more than Xiao Fang?
10, Dalin does more 15 crossing calculations than Xiaolin, Xiaoming does more 6 crossing calculations than Xiaolin, and Dalin does more crossing calculations than Xiaoming.
1 1, Xiaohua is 6 years old this year. Father said to Xiaohua, "When you grow to 10, I will be 40 years old." How old is dad this year?
12. There is a giraffe in the zoo. Its age is the number obtained by subtracting the smallest two numbers from two numbers and then subtracting one number. How old is this giraffe?
13, there are 260 peach trees and pear trees in the orchard, among which 20 peach trees are more than pear trees. How many peach and pear trees are there?
14, the brothers are 28 years old now. Three years ago, my brother was two years older than my brother. How old are these two brothers now?
15, the sum of two consecutive odd numbers is 36, what are these two numbers respectively?
16. The length of a steel pipe12m. Saw it into two sections, so that the first section is 2 meters shorter than the second section. How long is each part?
There are 17, class a and class b * * there are 1 10 students. If five students are transferred from Class A to Class B, the number of students in the two classes is exactly equal. How many students are there in Class A and Class B?
18, some books, 27 for Party A and Party B, 22 for Party B and Party C, and 25 for Party A, Party B and Party C ... How many copies for each of the three people?
19, Xiaohua is 6 years old this year. Father said to Xiaohua, "When you are 10, I will be 40 years old." How old is dad this year?
20. There is a giraffe in the zoo. Its age is the number obtained by subtracting the smallest two numbers from two numbers and then subtracting one number. How old is this giraffe?
Interesting topics of mathematics in the second grade of primary school
1, Miss Wang arranged the students' paintings in a row for exhibition. The eighth painting from the left is Fangfang's painting. How many paintings are on display from Fangfang's paintings to the right? 2. A book *** 100 pages. Page 30 from the front is a beautiful illustration. What page is this illustration on?
3. Thirty children lined up to visit, and were divided into two teams on average. Xiaohua ranked first. There were three people in front of her and several people behind her.
4. 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?
Students in Class Two (2) are arranged to do morning exercises in six rows. The number of people in each column is the same. Xiaohong stands in the first column. Counting from the front and from the back is Class 2 (2), Class 5. How many students are doing exercises?
6. Xiao Wang made a square with Go. No matter how many pieces are counted from front to back, from back to front, from left to right and from right to left, the middle piece ranks fourth. How many pieces are used in this square of Go?
7. In the second grade group gymnastics performance, Xiaohong Station is the fifth from the bottom, the seventh from the bottom, the second from left to right and the fourth from right. How many students are there in this team?
8。 Linlin is 8 years old, and her father is 26 years older than him. How old was Xiao Liang three years ago?
9. Liang Xiao's cousin is 18 years old and Liang Xiao is 6 years old. Five years later, how old is my cousin than Liang Xiao?
10, my sister is 6 years old, my brother 15 years old, and my brother is 2 1 year old. How old is my sister?
1 1, Huanhuan this year 12 years old. Four years later, Tian Tian was the same age as Huanhuan two years ago. How old is Tian Tian?
1 1. Father is 32 years old and son is 4 years old. How many years should it be when the father and son are 50 years old?
12, the army is six years old this year, and my mother is five times as old as the army. How old was my mother four years ago?
13. There is a string of colored lights on the TV tower, arranged in the order of "red, yellow, green and white". Please calculate, what color is 14? What colors are lanterns 27 and 36?
14, May 2007 1 is Wednesday, what day is it in 20 days?
15. Teacher Wang Yue distributed the pinyin cards numbered 1 ~ 64 to four children, A, B, C and D, in turn. Who should I send the number 59 card to?
16, there is a row of colored flags with 34 faces on the playground, which are arranged in sequence according to three red flags and one yellow flag. How many of these colorful flags are there? How many sides does the yellow flag have?
17. There are 28 rabbits in cage A and 6 rabbits in cage B. How to adjust the number of rabbits in the two cages to be the same? (The total number of rabbits remains the same)
18, there are two sets of peaches. After taking three from the first set and putting them into the second set, there are as many peaches in the two sets. It is known that there are eight peaches in the second set, and how many in the first set?
19, there are two dovecotes in the school. Pigeonhouse A has 2 1 pigeon more than Pigeonhouse B. After catching some pigeons from Pigeon House A and putting them into Pigeon House B, Pigeon House A has three more pigeons than Pigeon House B?
20. There are 48 students in two classes in Senior Two. After several girls were transferred from Class Two (1) to Class Two (2), there were fewer students in Class Two (1) than Class Two (2). How many students are there in Class Two (2) now?
The third interesting topic of mathematics in the second grade of primary school
1, six children are divided into one bag of apples and two bags. How many apples are there in this bag? Xiaoming's family eats four apples in the morning, noon and evening. How many apples did Xiao Ming's family eat a day?
3、99999+9999+999+99+9=()
4、93+96+97+95+89+90+94+87+95+92=()
5、36 1+972+ 1639+28=()
6、 1+2+3+…+38+39+40=()
7、(2+4+6+……+38+40)-( 1+3+5+……+37+39)=()。
8. Xiaohua has 10 red balloons, and Xiaohua has 8 yellow balloons. Xiaohua exchanged four red balloons for three yellow balloons for Xiaohua. How many balls does Kobanawa Xiaohua have now?
9. There are 9 students in the art interest group in Xue Fan primary school, and there are as many students in the calligraphy interest group as in the art interest group. How many students are there in these two interest groups?
10, it's getting late. Mom asked Xiaoming to turn on the light in the room, but the naughty Xiaoming pulled the switch nine times in a row. Can you tell me whether the light is on or off at this time? What about 20? 100?
1 1, Xiaoqing has 9 story books, Xiao Xin has 7 comic books, and Xiaoqing traded 3 story books for 2 comic books in Xiao Xin. How many do Xiaoqing and Xiao Xin have now?
Xiao Min went to the store to buy stationery. She bought 1 pencil with half of the money she brought, the remaining half bought 1 ballpoint pen, and the remaining 1 yuan. How much money does Xiao Min have?
13, (1) ○□□□□□□□△□……… The 20th number is ().
(2) ○○○○○○○○○○○○○○○○○○○○○○○○○○○○967
14, Xiaoyu practices calligraphy. She repeatedly wrote the sentence "Good teacher Xue Fan" in reverse, and the 60th word should be written as ().
/kloc-Students from Class 0/5 and Class 2 (1) participated in the tug-of-war competition in our school. The teams in their competition are arranged in the order of "three men and two women", and the 26th student is ().
16 has a column number: 1, 3,5, 1, 3,5, 1, 3,5 ... The 20th number is (), and the sum of these 20 numbers is ().
17, A, B, C and D are playing poker. Party A puts "Wang" in the middle of 54 cards, counting from the top, which is the 37th card. After thinking about it, Party C was the first to catch the card with confidence, and finally caught the "king". Do you know how C is worked out?
18, there is a row of colorful flags on the playground, with 34 faces, arranged according to "three red, one green and two yellow", and the last face is (). 7 1, "I love learning olympiad, I love learning olympiad ..." The 33rd word is ().
19, there is a pile of matches on the table, *** 16. Party A and Party B take turns to get 1 to 3 pieces at a time, and the person who gets the last 1 wins. Ask A how to win?
20, there is a pile of matches on the table, ***30. Party A and Party B take turns to get 1 to 3 pieces at a time, and the person who gets the last 1 wins. Ask A how to win?