1. Pupils math diary 300 words.
At noon today, I helped my mother go shopping in the market. I bought six steamed stuffed buns at fifty cents each, 6×5=30 (jiao), and 30 jiao equals 3 yuan. I gave my aunt who sells steamed buns 3 yuan. Then, we bought 4 Jin of celery and 1 Jin of 3 yuan, 4×3= 12 (yuan). I gave my uncle, who sells vegetables, a 20 yuan bill, and calculated that it was 20- 12 = 8 (yuan), so I should get my 8 yuan money back.
Finally, my mother and I went to the fruit stand and bought 8 Jin apples, 4 yuan A Jin, 8×4=32 yuan. I calculated that it was spent at noon today: 3+ 12+32=47 yuan.
My mother praised me for being smart and able to buy food. I was very happy. I will help my mother go shopping next time.
2. Pupils math diary 300 words.
When Mr. Huang taught us unit 3 measurement, I thought to myself: Why don't I measure the length and weight of other things? So, I started measuring. First of all, I found that the thickness of the idiom dictionary is three centimeters and one millimeter, the length of the book Laughing Cat Diary is eighteen centimeters and six millimeters, and the thickness of the book Naughty Ma Xiaotiao is six millimeters. At this moment, my mother immediately walked into the room and asked, "What are you doing?" "I am measuring the length of an object." "I ask you, how long is your skateboard?" "Sixty centimeters." "How wide is your room? How long is it? " I measured it with a tape measure and said, "It is 3.9 meters long and 3.5 meters wide." "You are great. You got it right. " Mom said. Finally, I said that the van has a load of one ton or something.
After I made these measurements, I found that mathematics was everywhere around us. As long as I observe it carefully, I can find its existence.
3. Pupils math diary 300 words.
Recently, we learned a new knowledge-fractions, which is very interesting. Learn how to use it in life and learn a lot from it! I remember that once my mother bought 10 cookies, my father ate four, my mother ate four and I ate two. Eating and eating, my mother said, "Sophia Kao, didn't you learn music?" ? Let's talk about it and see how you learned it. ""good! "I said!" Dad ate four tenths of the cake, mom ate four tenths of the cake, and I ate two tenths of the cake! "I am proud to say!" Great! "My parents said. I am so happy.
Students, the inspiration of writing math diary is that it is really important to learn math well! I like math. Mathematics impressed me deeply. Math, math, I love you, just as mice love rice. Do you know why I like math? Because of the charm of mathematics, it attracted me deeply.
4. Pupils math diary 300 words.
After lunch at noon today, my brother shouted for oranges, and my mother didn't have time to cut them for my brother while washing dishes. I said, "Mom, I'll cut it!" " "Mom said," Yes, but you should be careful with your hands! ""I'm so happy in my heart that it's rare for my mother to let me do it myself. I picked up a knife and cut an orange into four pieces, one by one. I cut it happily! Unconsciously cut all the oranges on the plate. Mom saw the oranges I cut and asked, "Zile, you cut so many, how many did you cut?" I touched my head and said helplessly, "I don't know how much I cut." Mom said, "What if there is a problem?" "Use your head." As I spoke, I counted up. There are 24 oranges in all, one for every four oranges. So I divided them into six parts, which is six oranges. I told my mother the answer, and my mother smiled and said, "Great, you learned to apply what the teacher taught to your life. You are a clever boy! " "
5. Pupils math diary 300 words.
Today, the weather is very good. I discussed with my parents about going to the supermarket to buy things. When I arrived at the supermarket, a dazzling array of things were in front of me, so rich! My parents and I wandered around, stirring up trouble. We bought four bags of potato chips at 2.99 yuan each, five bags of yogurt, 1.8 yuan, two bags of biscuits, one bag of 4 yuan, one bag of tomato sauce, 7 yuan, 1 catty of pork belly, 15 yuan, some Nestle crispy sharks, 22 yuan, and one bag of bitter is sweet, 3 yuan.
After shopping, it's time to pay at the cashier. My father asked me to calculate how much it cost, and so did my father. After a long three minutes, I said, "1 10. 96 yuan! " Dad said, "Congratulations, you got it right!" "
Hearing my father's praise, I can't help feeling smug and having fun with math!
6. Pupils math diary 300 words.
Take 10 to buy books on the third floor of Trust-Mart today. I searched and found a book "Myths and Legends". When I saw the cover, I knew there were many wonderful stories in it. I decided to buy it, but when I saw the price, I was shocked again. It turns out that this book is 1 1 yuan. Feel the money in my pocket when reading this book. I'm really embarrassed!
The assistant aunt saw my embarrassment and asked kindly, "What's the matter, little friend?" I said shyly, "I want to buy this book, but I don't have enough money." She asked again, "How much money did you bring?" "Cai 10 yuan." I said. Aunt smiled and said, "Look at the price tag, little friend. It also says' Book sales are discounted, all of them are 10% off'." I asked, "What do you mean by' 10% discount'?" Aunt said: "It is to collect money at nine tenths of the pricing. For example, 10 yuan's books only accept 9 yuan."
I calculated that this book is only 9.90 yuan. "Yes!" I thank my aunt again and again.
I bought a satisfactory book today and learned knowledge. I'm so happy!
7. Pupils math diary 300 words.
Today, I played darts with my sister. I found many math problems from this game! There are five circles on the dart target, the innermost circle is a red heart, and shooting can get 10 points, the second circle 8 points, the third circle 5 points, the fourth circle 3 points, and the outermost circle 1 minute. My sister and I had a life-and-death contest.
Sister, she scored 3 points on the fourth lap for the first time. The second shot dropped, and she didn't score! Just as I was smiling from ear to ear, my sister suddenly made progress. Hit the key and get 10 points. I am not happy now. Sister, she got a total of 13 points!
It's my turn I aimed for a long time. On the third lap for the first time, I scored 5 points. The second shot was not very good, only 3 points. If I want to surpass my sister, I have to shoot the innermost heart for the second or third time. As a result, I shot the second lap for the last time and won. I'm so happy!
8. Pupils math diary 300 words.
Today, I finished everything and felt bored, so I went to measure the circumference of the TV. When I measured the circumference of the TV with a ruler, I found that the ruler was not long enough. I thought: What should I do? It suddenly occurred to me that what xu teacher taught me today, we can use lines to measure. With this in mind, I started to do it. I cut a long white line and began to measure. When I was about to finish measuring, I found that the line was not long enough, but I didn't want to cut it, so I thought, how can I make it simpler? I went back to my room and picked up a book to read. After a while, I found a simpler method. Because my TV set is rectangular, which only takes up one length and one width. I picked up the thread and measured it. After a while, I measured it. One length and one width is 106 cm, but there are two lengths and widths, so 106 times 2 equals 2 12 cm. It turns out that the circumference of my TV set is 2 12 cm. 9. Pupils math diary 300 words.
Today, my father and I went to the bookstore to buy books. We came to the bookstore. I picked out a long-awaited book and went to the cashier. Dad said, "Your book 12.6 yuan, my book 16.3 yuan, I took three ballpoint pens, 1.5 yuan. How much is left in 50 yuan? If you guess right, the rest of the money can buy you ice cream. " I think: 50 minus 12.6 plus 16.3 plus 1.5 times 3 equals 16.6 yuan. I said, "16.6 yuan." "Well, this 16.6 yuan can buy you an ice cream." Dad said brightly that when I came to the ice cream shop, my dad asked me again, "I bought two ice creams with 1.5 yuan and paid 16.6 yuan. How much money is left? " I think: simple, 16.6 minus 1.5 times 2 equals 13.6 yuan. I said, "There is 13.6 yuan left." Dad said, "Not bad! Not bad. " I said angrily, "You underestimate me. This is a topic for two years. If I can't even know these, am I still a fifth-grade student? "
Mathematics is inseparable from life.
10. math diary, a pupil, has 300 words.
Yesterday, Mr. Sun asked us to make a 1 liter measuring device, and then use 1 liter to measure where the water level is in the washbasin at home after a liter of water falls. It takes about a few liters of water to fill the washbasin. When I got home, I took an empty bottle of orange with a disposable paper cup. In class, the teacher said that the ordinary disposable paper cup is 250 ml.
I filled the glass with water and poured the water into the bottle of orange one by one until the fourth time, because 4x250= 1000 (ml), 1 liter = 1000 ml.
The water in the bottle is already 1 liter. Then, I took it to the washbasin and poured it into it. A liter of water just passed the bottom of the basin, and then I poured it several times. The final result is that this washbasin can hold about five liters of water.
In this experiment, I got a preliminary understanding of liters and milliliters.