Traditional Culture Encyclopedia - Weather inquiry - How to write math diary in Grade Two?
How to write math diary in Grade Two?
20031October 8 weather +65438: Wednesday sunny.
Today, my mother asked me to do an Olympic math problem: Xiaojun and Xiaohao bought the same number of pencils with the same money. Later, Xiaojun took 13 pencils, Xiao Hao took 7 pencils, and Xiaojun gave Xiao Hao 30 points. How much is each pencil? I thought for a moment and said, "each pencil 1 cent." Mom said, "That's not right." Xiaojun took out six more pens and gave them to Xiaohao. Isn't it 50 cents each? Let me see the answer. "Double answer, the answer is 5 cents. Not convinced, I argued with my mother: "The answer may be wrong! Think about it, Xiaojun and Xiaohao used to spend the same money to buy the same pen, that is, each bought 10. Now Xiaojun has 13. Didn't he just take Xiaohao 3? Three 30 points, not each 1 minute? "Mom was caught by me at once, thought for a moment and said," Your algorithm is right. We should not blindly believe the answer. You are such a thoughtful boy. "After listening to my mother's praise, I smiled happily.
Enlightenment of riding a car
Jiangsu Province Haimen Dongzhou Primary School Class 2 (6) Chen Jianan
September 2003 1 day weather: cloudy on Monday
Today last year, I followed my grandmother to school by bus from the countryside. The conductor's aunt only asked her for the fare from Linjiang to Haimen, 3 yuan. I don't know why, so I asked her, "grandma, I'll take a bus with you, but my aunt only wants your fare." Why don't you want my fare? I am also a person. " Grandma smiled mischievously and said, "I don't know." You'll know why when you grow up. " This summer, I also went to school by bus with my grandmother. This time, menstruation asked her for the fare. Grandma gave her 3 yuan, but menstruation asked for 6 yuan for two people. Only then did I understand the truth. We are all the same. The problem is that I am taller than last year, so I have to buy a ticket to take a bus.
Buy goods
Jiangsu Province Haimen Dongzhou Primary School Class 2 (6) Chen Jianan
Weather on June 27th, 2003 +65438: Monday is sunny.
During the festival this year, my father took me to Times Supermarket to buy salad oil for my uncle and aunt in the factory. My father told me that I would give each person ten kilograms of salad oil. When I arrived at the supermarket, I saw five kilograms and 10 kilograms of salad oil. A barrel of five kilograms costs 2 1 yuan 8 cents. If I want to buy 10 kilograms, I should pay the supermarket 43 yuan 6 cents instead of 10 cents. The same 10 Jin salad oil, 1 jiao should be paid to the supermarket in 2 yuan. My father asked me, "It's the same as 10 kg oil, but 10 kg oil is cheaper than 5 kg oil. Why? " I thought and thought, thought and thought, and looked at my father inquiringly. My father said to use his head and think about this problem. I looked at the salad oil barrel in front of me, and suddenly realized that there was only 1 barrel of oil in 10 kilograms, but there were two barrels of oil in 5 kilograms, so this 2 yuan 1 corner should be the money of the salad oil barrel. Dad listened to me again and again, and I smiled proudly.
achieve many purposes at one stroke
Jiangsu Province Haimen Dongzhou Primary School Class 2 (6) Ni Hao
June 2003 65438+1October 65438+July weather: cloudy on Friday.
One wall of my kitchen is covered with white tiles, and a door is open on the wall. My mother asked me, "Do you know? How many tiles can this door save? " I counted, the height of the door is 13 watts, and the width of the door is 5 watts. I calculated by multiplication that it is 13×5= 10×5+3×5=65 watts. I think this is really killing two birds with one stone, saving tiles and facilitating access.
The floor of my house
Jiangsu Province Haimen Dongzhou Primary School Class 2 (6) Zhu Yulong
July, 2003 10 Weather: Thursday will be fine.
Today, my house has just been renovated, and my uncle came to see me. He saw the beautiful floor of my house and asked my father, "How is the floor paved?" I thought, what's the secret? It must be spelled casually. Dad said: "before you spell the floor, you should measure the floor size, then choose the right floor, and then, after cutting, you can spell it." Oh, isn't it just cutting the floor? What's so hard about that? Dad seemed to know what I was thinking, and then he said, "Longlong, don't underestimate cutting, it also needs careful calculation." The floor thus spelled out is beautiful and tidy. "Hearing this, my uncle asked me: Can you count? I smiled and thought: Mathematics is really useful. I want to study hard now, and strive to be a mathematician when I grow up, so that everyone's home will be warmer and better!
A catty of spinach, a catty of meat.
Jiangsu Province Haimen Dongzhou Primary School Class 2 (5) Zack Zhang
June 2003 65438+1October 2 1 Weather: Tuesday is fine.
In the evening, I followed my mother to the vegetable market to buy food. The market is crowded with people, which is the peak of the market! After shopping with my mother, I bought a catty of spinach and a catty of meat. On the way, my mother asked me, "Which is heavier, a catty of spinach or a catty of meat?" I took it for granted and said, "Of course spinach is heavy. There are so many spinach, but only a little meat. " Mom smiled and shook her head and said, "Think again." I thought for a while, but I couldn't help laughing and said, "Meat and spinach are a catty, and they should be the same weight. It seems that considering the problem can't just look at the superficial phenomenon. " My mother smiled with relief after listening to my explanation.
A good way to change.
Class 2 (5) of Dongzhou Primary School, Haimen City, Jiangsu Province
20031October 25 weather: sunny Saturday.
Today is the weekend. My parents and I go shopping in the supermarket. We bought a lot of things, and the assistant's aunt calculated with the computer and said, a ***53 yuan. Mother paid one 100 yuan and three 1 yuan coins. I think 100 yuan is enough. Why give three coins? Mom asked me to think about it. Seeing the 50 yuan that my assistant aunt gave my mother, I finally understood that it was 53-3=50, and then 100-50=50. Aunt, it's much more convenient to change. My mother told me: "In fact, this method of change is often used in life. As long as you observe and think more, you will find interesting mathematical phenomena. " I can't help nodding.
I am a little helper.
Jiangsu Province Haimen Dongzhou Primary School Class 2 (5) Yang Chen
165438+20031October 2 weather: sunny on Sunday.
Today is Sunday. I went to my father's company to play. My father said to me, "Yang Yang, don't you study statistics?" I said cheerfully, "Yes! Is there a problem? " Dad went on to say, "then I'll give you a task and test you by the way." Can you help me count how many computers are on the third floor of my father's company? " After listening to my father, I went with a pen and paper. At first, I counted them one by one. Then I thought about how many times I had to run back and forth. I had a brainwave and calculated according to the number of rows, *** 10 rows, each row 16 sets, and one * * 160 sets in the office.
I know the time and minutes.
Two (3) classes on
Today, our teacher Zhang gave us a math lesson, and many teachers came to attend.
I was a little nervous at first, but then the teacher asked us to dial the clock ourselves, and I gradually relaxed.
When dialing, I set the hour hand by 2 squares, which is 2 hours; I set the minute hand from 2 to 6, and the minute hand walked 4 squares, which is 20 minutes. My deskmate and I dialed and talked to each other. I think I have mastered this course well.
Later, after class was over, I looked at my watch and started class at 10. Now the minute hand has gone from 12 to 7 for 35 minutes, which means we have 35 minutes in this class.
Know when and when
Chen Zhuoyuan of Class Two (1)
Today, we had a math lesson about knowing time. In class, I learned that 1 hour equals 60 minutes. I also learned that there are 12 squares on the clock face, and when the hour hand moves one square, it is 1 hour.
The teacher also let us experience 1 minute. 1 min, I shot 267 goals. Isn't that great? 1 minute can do a lot of things, so cherish every minute.
This time, the student's math diary is well written. Here are some students' math diary, but let's share them!
Geometry in life
Qiujiarui
In our life, we have seen corners, especially people. A square has four right angles. There are two squares that add up differently, because one square is more than twice as large. So there are four more. So what is a geometric figure? I think it is a figure with angles. Because, I think because there is no figure without corners in the world, a parallelogram has four corners and a diamond has four corners. According to (Yu)
I saw my bookcase, which is made up of 19 rectangles. Its angles are all 90 degrees right angles. There are two rectangles that make up a square. One side of the square is 52 cm. There are six squares on the bookcase, and a square has four right angles. There are 4× 6 = 24 angles. In other words, six squares have 24 corners. I also know that there are many horns in our house, and there are all horns there. The right angle is the most used in our life. (Yang) According to
The door of my wardrobe is rectangular. Our family has a rotating CD rack with a square top, our refrigerator door has a triangular joint and our family has an ironing board. After opening, it forms a parallelogram with the bracket. My mother's room window has a trapezoidal marble windowsill. (Jiang Zhuocheng)
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