Weekly account of fourth grade mathematics

Inadvertently, in the blink of an eye, a week has passed. You must have learned many new skills in a week. Let's learn to write a weekly diary together. I believe many people will find it difficult to write the weekly diary. The following is the fourth grade math weekly diary I collected for you, hoping to help you. Fourth grade math weekly article 1

"Wash and brush, wash and brush! Oh yeah! " I'm humming a ditty while doing housework. It's really pleasant!

"Rui er! Come and tidy up this pile of umbrellas! " "ok! I'll be right there! " I skipped to my mother. While I was packing my umbrella, I hummed a little song: "La la la! La la la! I am a little expert at packing umbrellas! " "Hey? Strange! How is this umbrella wobbling? It's not stable at all! " I was very moved and wondered. Mom also heard the sound coming, and we observed it carefully, only to find that one of the "ribs" connected with the umbrella handle was broken. "Then why can't an umbrella with a broken rib be used?" The general impact should not be great! " I feel very confused. Mother turned the bead around and came up with the answer at once, but she still said wittily, "guess!" "

Seeing my puzzled face, my mother couldn't help laughing and smiled and said, "Look, there is a triangle between this" bone "and the umbrella handle, which is stable and can make every umbrella shrink freely; If it is quadrilateral, it will be wobbly, unstable and unbalanced, which will be very inconvenient to use. " "oh! So that's it! It seems that mathematical knowledge exists anytime and anywhere! " I can't help secretly admiring.

Mathematics knowledge is really everywhere and widely used! What a "combination of mathematics and life"! Fourth-grade math weekly 2

2xx year x month x day x day

This morning, the teacher handed out the math exercise book, and I looked, "How did you make a mistake in an application problem?" I said in surprise. After a closer look, it turns out that one step of conversion is missing. I thought about it carefully. How many kilometers should 24 meters be equal to? 24÷1=2.4 (km) Oh, it turned out to be 2.4 km, so I filled it in for the teacher's approval. The teacher looked at it and said, "The unit of 34×6 should be meters, not kilometers." I looked at it, and it turned out that the unit of the above formula was written wrong. I changed it again, and this was approved by the teacher.

today is the first time that I have approved it for the teacher twice. I could have approved it for the teacher once before. I think we can give the teacher a batch of good students once, so I used to be an upper-middle class in Yangshi. Fourth-grade math weekly 3

Today, my parents and I went shopping in the supermarket. We went to the stationery section first and saw a pencil for 6 cents. A watercolor pen is about 6 cents; An eraser is about 6 cents; A ruler is 1.4 yuan; A bottle of ink is 2.7 yuan; A pencil box is about 2 yuan. We can know that a watercolor pen and an eraser cost about the same amount of money, and eight bottles of ink cost about the same amount as a pencil case. We then went to the food section and converted the prices of some foods into 1 grams, and reached the following conclusions: cabbage is the cheapest in 1.3 yuan; Rice 2.8 yuan; Noodles 7.3 yuan; Fast food noodles 22.3 yuan; Bread 24 yuan; Meat 36 yuan; Potato chips are more than 8 yuan; Coffee 95 yuan; Finally, chocolate 15 yuan-18 yuan is the most expensive. It can be seen that things that are not processed very much are usually cheap, while processed things are usually expensive. Although potato chips look cheap, they are actually very expensive. Besides, they are junk food, so we should try to eat as little as possible.

Mathematics is really a useful science! Fourth-grade math weekly 4

Today, my father and I went to the bookstore to buy books.

we came to the bookstore. I picked out a book I had been looking forward to for a long time and went to the cashier. Dad said, "Your book is 12.6 yuan, and my book is 16.3 yuan. I will take three ballpoint pens from 1.5 yuan and give them to 5 yuan. How much is left? If you guess right, the rest of the money will buy you ice cream. " I think: the sum of 5 minus 12.6 plus 16.3 plus 1.5 times 3 equals 16.6 yuan. I said, "16.6 yuan." "Well, I'll buy you ice cream for 16.6 yuan." Dad said cheerfully,

When I came to the ice cream shop, my father asked me again, "I bought two ice creams from 1.5 yuan and paid 16.6 yuan. How much is left?" I think: simple, 16.6 minus 1.5 times 2 equals 13.6 yuan. I said, "There is still 13.6 yuan left." Dad said, "Not bad! Not bad. " I said angrily, "You underestimate me. This is a two-year topic. If I can't even know these, am I still a fifth-grade student? "

Mathematics is inseparable from life. Chapter 5

Today is my mother's birthday. Mom goes to work in the morning and won't come back until evening. After 8 o'clock in the evening, my mother came back. While eating the cake, my mother said to me, "Mom will test you. If you get it right, you can have a piece of cake, ok?" I said "no problem" and began to answer the questions.

mom asked the first question: mom is 36 years old, you are 1 years old, and how old is mom? Grandma is six times your age. How old is grandma this year? I quickly worked out the result by mouth. I said, "My mother is 26 years older than me, and my grandmother is 6 years old this year. It's too simple, and my cake will be eaten."

Mom smiled and said, "Are you proud?" One more question: Xiaoming is 8 years old and his father is 4 years old. In a few years, will his father be twice as old as Xiaoming? Now I am silly, thinking hard, it seems that my cake can't be eaten, and my mother said, "What's the matter?" "Let me think about it. I can't think of it. I don't eat cake."

after a while, I thought of a stupid way. I can find out their ages. After a year, both Dad and Xiaoming are one year older, and finally I figured out that after 24 years, Dad's age is just twice that of Xiaoming.

I told my mother what I thought, and she said there was a simpler way. Then she told me, just subtract Xiaoming's age from his father's, and Xiaoming's age will be 32 years later, and then 32-8 = 24 years will be the number of years that have passed. It suddenly dawned on me that it could be so simple.

Mom said: It's still good that I can find a way to get the result by myself. As a reward, I am happy and embarrassed. I can't be proud in the future, and children should not learn from me. Math Weekly Notes for Grade Four 6

Mathematics in primary schools can neither be said to be difficult nor simple. Simple as it is, these are the basic things, which are indispensable. Here, numbers and algebra are necessary things. Because I have studied Austrian numbers, I have been exposed to numbers and algebra since I was very young. Once, I met a trouble in my study-I couldn't do an Olympic math problem. I thought hard and couldn't find a standard answer in my heart. I was anxious in every way, so I thought of an idea-to ask our math teacher. I was very nervous, took a deep breath, closed my eyes, and asked the teacher what to do before he left! I hurried to the teacher, who was clearing the table. I said inexperiently, "Old teacher, I don't understand a question. Please help me solve it!" " The teacher looked at me and took the book without hesitation. His eyes swept through the questions, his eyebrows wrinkled, and he thought a little. Then he calmly took out a flat piece of single-line paper from the bag and took out a pen. He listed the problem-solving methods for me and told me carefully while carefully listing them. "This one should be counted like this. If this one is wrong, it will be all." He gave me a clear idea, which made me nod again and again. The teacher not only let me know the solution of this problem, but also let me understand a way to solve it. The problem at the back of the book is even simpler for me, which is really a piece of cake for me now. After that, I thanked the teacher again and again and repeatedly and said, "Thank you so much, teacher. You told me about this problem, and I will definitely do it during the exam." The teacher's face also smiled and was happy for me. From then on, I fell in love with mathematics and loved thinking. Gradually, I learned more and more questions and became more and more interested in mathematics. In fact, it is not difficult to learn mathematics. The key is to find the knack and be willing to ask questions to the people around you. Only in this way can your mathematics level be gradually improved. It is not difficult to learn mathematics, but how to enter the palace of mathematics. Fourth-grade math weekly 7

I have been in the fifth grade, and the figure of Dou Weibin, the fourth-grade math teacher, has gone away. It may be difficult to see him, but his kindness in teaching will never be forgotten by me.

Mr. Dou is handsome, kind and of medium height. The hair is thick and dense, and above the bridge of the nose, there is a pair of glasses. A pair of big eyes with a spirit seems to be able to see through the maze students' minds.

Mr. Dou is strict with himself. Every morning, he comes to the classroom to give us lessons. Every class will say some humorous words, which makes us laugh. No wonder his surname is "funny." But behind him are countless drops of hard sweat. In the office, there are still many homework in line, waiting to be corrected. When class is over, he always goes back to the office. Without even taking a sip of water, he starts preparing lessons and takes notes from time to time. His back has become my future path. At night, in the dead of night, he is still sitting in his office preparing lessons selflessly, and his figure is still flickering under the lamp.

Mr. Dou is not only strict with himself, but also strict with his students. Once, I was careless in the math exam and regarded 27*3 as 27*3. As a result, my math score slipped from the first place to the fourth place. At that time, I thought, it's just a zero. Is it necessary to deduct 2 points? But the teacher looked at me kindly and said, "Although it is only a zero, it reflects that your learning attitude is not rigorous enough. You should not correct it now, and you will make mistakes in the exam in the future." This sentence is the most beautiful ripple in my heart lake, and it has always encouraged me to move forward on the road of learning.

This is my math teacher, a selfless teacher who is strict with himself and his students. He has become the most beautiful lighthouse in my eyes, illuminating my future path. Weekly Notes on Mathematics for Grade Four 8

It will be sunny on Friday, September 25th

This week, under the patient explanation of the teacher, we learned the knowledge of statistics.

The teacher asked us to collect and sort out the data first, and then taught us to make a statistical chart with the horizontal axis and the vertical axis. After mastering it, I made statistics on the electricity consumption of my home in January, February and March this year, which is not only clear at a glance, but also convenient and practical.

Teacher Guo repeated the sentence: "Life is inseparable from mathematics. Practice more, lay a good foundation and continue to work hard. In 123188, we began to learn the knowledge in the next unit. Chapter 9

One day, Sister Xixi gave us a game: two people take turns to count from 1 to 1, and only one, two or three numbers can be counted at a time. Whoever reports to 1 first will win.

everyone wants to "knock down" each other, but how can we make ourselves 1% victorious? This question always reverberates in my mind, which makes me puzzled.

when I got home, I picked ten stones in a small basket for a novice to operate. I called my father and asked him to play this game with me. I found a pen and a notebook and recorded every step I did. The rule is this: my father and I take turns taking stones, taking at most three and at least one. Whoever gets the last one wins.

I failed in the first game. It turned out that dad took it first, and dad made me lose "miserably" in the shortest time; I won the second game first, and I actually won ...

I read the record several times, and finally found that I added the largest and smallest numbers, that is, 1+3=4, and divided the total number of stones by the sum of the largest and smallest numbers, that is, 1 ÷ 4 = 2 ... 2. If there is a remainder, I will take it first, and the remainder is just a few. Now that the remainder is 2, I will take 2 stones, and the sum of the remaining stones and the other party's is divisor 3, so I can win.

In order to ensure the accuracy of the answer, I took 28 stones to play with my father again. With the above rules, I was invincible! ! !

It turns out that mathematics is everywhere in life, and they are waiting for you to discover! Chapter 1

This week, we learned a new lesson-statistics.

this unit of statistics is available in every book. The most important thing in statistics is to find the average, because only in this way can we compare the good ones. The average is obtained as follows: the total number ÷ the total number of copies can be obtained.

We also learned a content: double bar statistics. We used to learn simplex statistics. Generally, double bar statistics have some data on them, and these data are for you to fill in. The method of filling in is to use a symbol to represent a number, so it is not easy to mix up statistics. This is why I am wrong. My easy mistake is to add the wrong number, and then I will be wrong. There are other topics, such as skipping rope: one group of four people jumped 36 times, while the other group of four people jumped 1 times on average. How many times did each of these two groups jump on average? I was so wrong. I didn't see a * * * and the average clearly, so I counted them as the average. I will pay attention to the problem before I do it.

this is what I gained in a week. Chapter 11

This week, we learned the addition and subtraction of decimals.

Matters needing attention in addition and subtraction of decimals are as follows: the decimal points of decimals are aligned, and then counting from the end, when the decimal number reaches ten, the decimal number advances by one, and don't forget to add the decimal number, and don't forget to subtract the decimal number. Some operation laws in integers are also used in decimals, for example, additive commutative law and the law of additive combination can also be used in decimals, for example, .1+.9+.3=? The additive combination law can be combined into (.1+.9)+.3, which can be simplified. For example: .1+.9 additive commutative law is .9+.1. Of course, the addition operation law can also work.

I also know how to find the addend. When finding the addend, I can find another addend by adding and subtracting the addend. I also know how to find the minuend by subtracting the minuend. I also know how to find the minuend by adding and subtracting the minuend. Especially when the number of minuend digits is not enough, it is necessary to fill the number of minuend digits with zeros, and make the number of minuend digits equal to the number of minuend digits.

this is my harvest in a week. Weekly Notes on Mathematics in Grade Four 12 < P > Thursday, October 13th It's sunny < P > Today, the teacher asked us to use a calculator to verify the law of quotient invariance in division.

I gave several examples, such as: Example 1: 16÷ 2 = 8 cases 2: 6÷ 2 = 3 cases 3.