Excellent math diary is 300 words.
Sudoku, a mathematical puzzle game, has many kinds: standard Sudoku, extra area Sudoku, unequal Sudoku, window Sudoku, odd-even Sudoku and so on.
"1 impossible, 2 impossible, 3 impossible" There was a series of "impossible" sounds faster than a cannon in the room. That's right. My father and I are playing a standard sudoku game. "Standard Sudoku" is like this: the numbers in each row, column and house (3*3) can only be filled in 1 to 9, and cannot be repeated. Fill in the blanks according to the known conditions.
When I first started doing the first Sudoku problem, I was still very unskilled. I used several hypotheses, but I broke the rules and had to push them back. So we learn a lesson, don't use assumptions, skip the blank that has many possibilities and can't be done first, and only do the blank with only one answer. After completing the blank with only one answer, with fewer and fewer blanks, there are many possible blanks that have only one answer, and Sudoku is solved.
When we do the second Sudoku problem, we divide it by three times, five times and two times. From beginning to end, I hardly met the slightest "resistance" from the "enemy" and solved the problem more difficult than the first one very smoothly.
The hardest part is actually in the beginning As long as you are not afraid of failure, stick to it and find a way, you will be unstoppable and win.
Excellent math diary 300 words two.
In the afternoon, in the happy classroom, Miss Li played a math trap game with us.
The rule is that students count off in turn after they go. Anyone who quotes a multiple of "3" will have to give a high five. If they violate the above two rules, they will stand in the corner.
The game started, and my heart kept beating. Haha, our group didn't come first, which scared me to death. We are the audience, and the other groups will start first. Miss Li said "Go straight down" until he said "7" and he said "9". Say that finish, the classroom burst into laughter. He walked slowly into the trap.
Until the boy who said "9" wanted to high-five, he said "9" and there was another burst of laughter in the classroom. Later, everyone who fell into the trap was the same. At 18, she also said "18". Miss Li asked her to dance or sing, barking like a dog, and she cried. This is the first time I let her come up, and she cried.
When it was our turn, I quickly counted which one I ranked, which scared me to death, because I ranked "5" and didn't need to high-five. It's my turn I said "5" without thinking. I am not nervous anymore. When I said "3 1", I was nervous again. I said "32" and stood in the corner.
This game is so exciting that I like it very much.
Excellent math diary 300 words three.
Do the homework on 19 in the math book today. After finishing, do it for the first time and give it to my mother for signature. My mother said that if I didn't finish it, I would check it and make it up. Second, give it to mom for signature. Mom said, I haven't finished it yet. Check it again and make it up. Sign my mother's name for the third time. My mother was angry and said loudly that it wasn't over yet. Please check it carefully and make it up. The fourth time, I checked carefully from the first question to make sure there were no missing questions before handing them over to my mother for signature. Fortunately, I finally passed the test. After my mother signed it, she severely criticized me, saying that my heart is thicker than the pier of Jiubao overpass, and I must form the habit of self-checking homework in the future, otherwise I will get good grades in the exam and fail if I am not careful.
Excellent math diary 300 words four.
The happy winter vacation has begun. My sister's math homework is to do ten problems at 24 o'clock every day. Every noon, we will play 24 o'clock.
First, get rid of all "Wang, Xiao Wang, J, Q, K" in a deck of poker. Then, draw four cards at random and use the method of "addition, subtraction, multiplication and division" to see who can work out 24 first. The cards in the first game are "4, 7, 6, 2", and my sister and mother soon figured it out. I am so anxious that I can't figure it out and want to give up. Later, my mother patiently told me the method, and I slowly learned it.
There is a game of "1, 8, 9, 6". I was the first to figure it out, and my heart was full of joy. This is really too simple! Add up the four figures and it is exactly 24. After a while, my mother worked it out, first "(96)X 1=3" and then "3X8=24". The same number can have many different uses.
Students, isn't this 24 o'clock very interesting? Use your head quickly and have fun!
Excellent math diary 300 words five.
In today's interesting math class, xu teacher taught us to make three-dimensional figures with plasticine and toothpicks. Xu teacher asked us to build a prism and a cube according to the three-dimensional figure on the big screen, and then create an interesting three-dimensional figure by xu teacher's method. The children used their rich imagination to come up with all kinds of three-dimensional graphics. Some built cuboids to be done in the next class, some built the same shape as houses, and some built a very complicated iron tower, especially Li Yuxin, who had a great effort to build a three-story house. It was not finished until class was over, and her work was praised by the whole class. This interesting math class makes students understand that they can also build complex graphics with the simplest materials and make them ever-changing.