Math diary 10 for pupils in summer vacation.

Math diary 10 composition for pupils in summer vacation.

Diary refers to the carrier used to record the content, and it also refers to a notebook for taking notes every day or a record of things encountered and done every day. The following is the composition of math diary 10 for primary school students in summer vacation. Welcome to learn from them!

Math diary 1 Pupils have a holiday in summer vacation! Have a holiday! The children's favorite summer vacation has finally arrived! In order to reward me for winning the first place in my class in the final exam, my brother decided to take me to an amusement park for a day. Mother gave us 20 yuan money to prepare our own lunch.

My brother and I happily came to Captain Budd's bakery to buy bread. The people in the bakery are really in an endless stream! There are all kinds of bread on the shelf, including sandwich bread, red bean bag, floss bag and so on, which makes people drool. Everyone is carrying a small basket and carefully choosing their favorite bread.

After about 5 minutes, I chose a croissant and a doughnut, and my brother chose a fluffy bun and a sandwich bread. Just as we were going to pay at the counter, an aunt with big eyes smiled and said, "Little friend, our store is having a promotion today. As long as you buy 20 yuan money, you can give a piece of Mu Si cake for free. " Hearing this sentence, my brother and I immediately cheered and began to calculate.

I remembered the math teacher who taught me to solve problems by multiplication: "I see! The total amount of bread bought by my brother plus the total amount of bread bought by me is 5×2+4×2= 18 (yuan), and 20- 18=2 (yuan). If you want a free moose cake, you must buy 2 yuan money. " My brother touched my head and said slowly, "Xing 'an, there are two 5+4 in these four breads. We can also calculate: (5+4)×2= 18 (yuan), and we can buy two bottles of mineral water at the unit price 1 yuan to charge 20 yuan. "After listening to my brother's analysis, I jumped three feet high with joy.

I am so happy today! We not only spent a pleasant day in the amusement park, but also ate free cupcakes. It seems that learning math well can bring us many benefits!

Math diary 2 Summer Vacation for Primary School Students This summer vacation, my family came to Sanqingshan Mountain in Yushan County, Shangrao City to play.

According to online search, Sanqingshan is a famous Taoist mountain in the south of the Yangtze River. There are all kinds of stones, pine trees and wild flowers all over the mountain. We arrived at the hotel near Sanqingshan the night before and arrived at the ticket office of Sanqingshan early the next morning.

Holidays are the peak of tourism, and there is a long queue at the ticket office. While waiting, I saw a price list hanging on the upper right of the ticket office:

Admission+ropeway price: adult 200 yuan, student 100 yuan (1.2m- 1.5m), children under 1.2m don't need to buy tickets.

I excitedly said to my father, "Dad, I am less than 1.2 meters tall, so I don't need to buy a ticket!" "Hearing this, Dad said cheerfully," Do you think that everyone except you 1 1 is going to pay 2000 yuan for tickets? "

As soon as my father's voice dropped, I quickly found out that there were 7 adults and 4 children in the remaining 1 1. So the fare is: 7× 200+4×100 =1400+400 =1800 (yuan).

Hearing this, my sister waved her hand and said, "No, my cousin is also a student, but his height is 1.6 meters. He will buy an adult ticket if he exceeds 1.5 meters! "

Yes, I actually missed the important information in the price list. Only those whose height is between 1.2m and 1.5m can buy student tickets. Now 1800 yuan is not enough. The fare should be: 8× 200+3×100 =1600+300 =1900 (RMB).

After calculating the fare, I proudly reported to my father: "Except me, the fare for the rest 1 1 people is 1900 yuan. It is enough to prepare 2000 yuan, and there is still 100 left! "

Everyone praised me and praised me as a small expert in calculation!

After buying the tickets, we went up the mountain by cable car. The mountains are full of beautiful scenery, much better than the pictures on the internet! On this day, we had a good time.

During the summer vacation of 3 primary school students in math diary, my father came back from work at noon, humming a ditty, and happily stepped into the house. I greeted him immediately and asked, "Dad, what's so happy today?" Dad said, "This month, my salary has gone up, a lot!" " "I asked curiously," how much salary do you get now? "Dad thought about it and said," If your mother's salary is _ yuan a month, and I am a little more than your mother's salary, and the two of us add up to 3600 yuan, how much salary can I get a month? "

After listening to my father's words, I immediately took out my pen and paper and began to draw line segments on the paper to help me understand.

After careful observation and thinking, I got the answer and told my father: "First, if my mother's salary is as much as my father's, then my father's and mother's monthly salary is (3600+ 100)=3700 yuan, and then divide the sum of monthly salary into two parts, and 1 part is my father's monthly salary. The formula is: (3600+ 100)÷2= 1850 yuan.

Dad nodded with satisfaction after listening, and I was very proud. At this moment, my mother who was cooking suddenly said to me, "Is there no other way?"

"Is there any other way?" I said in surprise. So I am curious, calm down and think again. The key to suddenly discovering this problem is to find out who is the standard. Different standards have different methods. So, I have a second method: taking the mother's salary as the standard, assuming that the father and mother's salary are the same, then the sum of the monthly salary of two people is (3600- 100)=3500 yuan, then divide the sum of the monthly salary into two parts, and the 1 part is the mother's monthly salary, and finally add/kloc-0 where the father is more than the mother. The formula is (3600-100) ÷ 2+100 =1850 yuan.

After listening to the second method I introduced, my parents smiled happily.

Math is really interesting!

Summer vacation for primary school students math diary 4 The happiest thing in summer vacation every year is to go back to grandma's house to break corn. Corn hung on the corn stalk one by one, laughing like winning the first prize, revealing golden corn kernels.

Grandma grabbed the corn cob with her left hand and the corn cob with her right hand, and pressed it down hard. There was a bang, and a chubby corn cob was in her hand. Sister also learned the appearance of grandma, holding the corn cob in one hand and the corn cob in the other, and the corn cob was obediently broken off. I followed my sister to catch the heavy corn cob and put it in the basket.

I saw that the corn in the basket was gradually full. My mother went over and said, "Tian Zi, will mom give you a math test?"

I said confidently, "No problem, I am a little math star in our class!" " "

"Grandma broke off 26 corns, and my sister broke off half the number of grandma. How many corns did they break? " Mother asked like a teacher.

The math teacher once taught us that when we encounter problems, we should carefully examine them. This question requires grandma and sister to break a few corns. Be sure to find two conditions: the number of corns broken by grandma and the number of corns broken by sister, and then add them up. But the title does not directly tell us the number of corn that my sister broke. What can we do?

At this time, I remembered the teacher's teaching to solve the problem of average score by division. My elder sister broke half the amount of grandma's, that is, 26 corns were divided into two parts on average, and one of them was my elder sister's. So the number of corn picked by my sister is 26÷2= 13 (one). Then add up the corn they broke: 26+ 13=39 (block). Mom and grandma listened to my analysis, nodding and praising.

The sister on the side listened and said, "Tian Zi, this problem can also be calculated by a comprehensive formula, which is more convenient!" 26+26÷2=39 (a)"

Mother touched the heads of our two sisters and said with a smile, "You are all math stars!" " "

I am very happy today. Not only did I eat my grandmother's sweet corn, but I also passed my mother's math exam! What a great harvest!

After breakfast of five primary school students in math diary during the summer vacation today, I said to my mother, "Mom, the sun is shining, let's go cycling." Mom said, "Yes! But I have a question. Can you help me answer it? " I said, "What's the problem!" Mother added, "Can you help me observe the shape of the bike?" I readily agreed, so we went to the garage and pushed the bike out. I observed that the wheel is round, the bell of the bicycle is round, and the cushion is triangular but not triangular. I asked my mother with a bitter face, what shape is this? Mom said she didn't know either, so I just watched it for a while, oh! This is the shape of a water drop. Mom added: "Xiangxiang, you are observing what else you have learned about bicycles." It turns out that the backrest of the bicycle back seat cushion is square. My mother praised me, and my mother said, "Yes, there is progress!" "Then we happily went to grandma's shop by bike.

At noon, after lunch, my brother and I went to play with friends by bike. We are sweating, thirsty and thirsty. My mother gave me 20 yuan money. I went to the store and bought two bottles of juice 1 bottle of mineral water. I asked the cashier how much these were. Aunt replied: "4 yuan juice, a bottle of mineral water, 1 yuan, a bottle." I calculated that 4+4+ 1=9 (yuan), I have 20 yuan, and 20 minus 9 equals 1 1. I gave the money to my aunt, and she gave me the change 1 1 yuan. I was so happy that I went home with my mother and brother with juice and water.

Pupils are in math diary for the summer vacation. Today, my mother and I went to the bookstore to read books. Mom said, if you have good books, buy them, but if you don't have good books, read them.

Mom has read six books, with an average of 12 yuan. I read 18 books, which is three times that of my mother, but each book is only 6 yuan on average, so the price of each book my mother reads is twice as high as mine.

Mom saved 72 yuan, I saved 108 yuan, and we both saved 180 yuan. Ah, what a savings!

The summer vacation of 7 primary school students in math diary is 65438+1 October 1 National Day, People's Republic of China (PRC) was founded 1 949 65438+1October1,and today is 20 _ _ 65438+1October.

On National Day, my parents took me and Beibei's brother and sister to Zhaoqing. One went to three cars. There are four people in the first carriage, three people in the second carriage and five people in the third carriage. 1+ 1 = 3. A * * * has three cars. 4+3+5= 12, a * * * has 12 people. At 9 o'clock in the morning, we set out from Guangzhou. Because of the traffic jam, it was already afternoon in Zhaoqing 13, and we walked all the way for four hours.

Math is really interesting. Life is everywhere.

Math diary 8, a primary school student's summer vacation. Today, my family packed three large plates of jiaozi. I counted 68 in a jar. At this time, my father asked me, "If there are six people eating, how much will each person get?" I wrote a formula: 3×68÷6=, I think: First, how many coquettes are there? I listed 3×68 vertically and calculated that there are 204 * *. It is very easy to know the total number of hinges and distribute them to six people on average, 204÷6=, and the calculation result of column sag is 34. I told dad to eat 34 jiaozi each.

It turns out that life is inseparable from mathematics.

A beautiful day for primary school students in math diary during their summer vacation. My parents took me to Hefei Science and Technology Museum to see the shell exhibition. The shells here are too beautiful to count. There are the most precious shells here-golden snails, the oldest nautilus, the most gorgeous snails for thousands of years ... too many for me to see. After reading the exhibition, I realized that there are about 6.5438+0.2 million kinds of shellfish in the world. There are more than 65438+ million shapes. The sizes are also different: the small one is only 0.03 mm long, and the large one is 1.8 m long, and the weight can reach about 500 kg.

Do you think shellfish is amazing? Come and have a look! Take a picture with a shell like me!

Math diary 10 One night during the summer vacation, my mother took me to Century Lianhua Supermarket. I saw so many people in the shopping mall! There are many things in it, such as stationery, food, clothing, alcohol, tobacco, toys and so on. My mother and I bought seaweed, milk, jelly, drinks, shredded squid, shower gel, socks, plums, vanilla and chocolate. Their prices are: 23 yuan, 9 yuan, 3 yuan, 5 yuan in June, 28 yuan, 3 yuan, 40 yuan, 6 yuan, 1 yuan,1yuan. In front of the checkout counter, mother said, "son, can you compare the speed with your aunt?" Calculate the amount to be paid? "I know my mental arithmetic ability is not very strong, so I quickly found a piece of paper and a pen, and calculated it quickly and seriously, but it was still not as fast as the assistant aunt's computer, when I told my mother the result.

In the evening, I saw a problem in the Olympiad Book: the number of apple trees in the orchard is three times that of pear trees. Master Lao Wang fertilizes 50 apple trees and 20 pear trees every day. A few days later, all the pear trees were fertilized, but the remaining 80 apple trees were not fertilized. Excuse me: How many apple trees and pear trees are there in the orchard?

I am not intimidated by this question, but it can stimulate my interest. I think the apple tree is three times as big as the pear tree. If two kinds of trees are to be fertilized on the same day, Master Lao Wang will fertilize "20×3" apple trees and 20 pear trees every day. In fact, he only fertilizes 50 apple trees every day, which is 10, and the last 80 trees. Therefore, Master Lao Wang has been fertilizing for 8 days. 20 pear trees a day, 8 days is 160 pear trees. According to the first condition, there are 480 apple trees. This is to solve the problem with the idea of hypothesis, so I think the hypothesis method is really a good way to solve the problem.