1. math diary, Grade Five, 300 words.
This morning, I made an appointment with Xiaoming and Xiaogang to play a ball after school. After school in the afternoon, we happily came to the playground and began to racket balls. Xiaoming's filming is in full swing. Xiao Gang said: "We are racing against time to see who will make the most shots in 5 minutes!" "Then, he took out his watch from his schoolbag and asked," Who will come first? ""me! " Xiao Ming and I shouted in unison. Xiao Gang thought for a moment and said, "We use stones, scissors and cloth to decide. "The end result is the first Xiao Gang, I am the second, and Xiao Ming is the third.
It's time to start the game. Xiaogang picked up the ball and raced against time. Xiaoming and I are counting the time. Xiao Gang made 205 shots in 5 minutes, but I made more shots per minute than Xiao Gang 1 time, and Xiao Ming made fewer shots per minute than Xiao Gang1time.
Students, can you guess who is the first? Are there any achievements between Xiao Ming and me? Hurry up and use the math knowledge you have learned to help us calculate.
Ha ha! Have you worked it out? I shot 120, and Xiao Ming shot 195. You know who is the first.
Students, have you found that mathematical knowledge can be seen everywhere in our lives? Be sure to study hard and use it flexibly!
2. Grade five math diary 300 words.
Today is Friday, and the test paper has been handed out. When I saw the results, I couldn't believe my eyes, only 86 points short. I am really ashamed and envious to see that others got a score of 100. I wish I could get a score of 100. But I blame myself for being careless, and I also blame myself for suddenly having a stomachache before I finished checking the first half of the test paper. I really don't know what happened.
And I clearly found a problem wrong, but I didn't have time to correct it. The question is 4 points. If I add up the scores of this question, I can get 90 points. This exam taught me a lesson: don't eat anything except dinner before the exam.
And the check is to write quickly and carefully, don't write typos, or the right one will become wrong, and count it several times. Write the answer quickly and not carelessly, because there is still time to check later.
3. math diary has 300 words in grade five.
Winter is coming, and the little squirrel has to prepare food for the winter. One day, the little squirrel came to the forest with a big bag on his back and said to Grandpa Pine, Would you please give me your pine cone? Grandpa Pine was generous and said: Pick as many as you want. The little squirrel is very happy. He picked it up and sang. Soon the bag will be full. Grandpa Pine asked: How many did you pick? The little squirrel said, Oh, I forgot! Grandpa Pine smiled and said, "I planted 16 pinecones, and there are nine more. If you can figure out how much you picked, I'll let you carry it. " The little pine tree is in a hurry and can't be counted. What shall we do? If Grandpa Pine won't let him take it away, what will he eat in winter? I will help it.
In math class, the teacher said: knowing the total number and finding the partial number is to remove the known partial number from the total number and get another partial number, which is calculated by subtraction. I soon figured it out that the little squirrel picked 16-9 = 7 (pieces).
Comments: You can apply mathematics knowledge to your life, which shows that you are very serious in listening to classes. Keep trying!
4. Grade five math diary 300 words.
In life, mathematics is everywhere. For example: buy food! Buy stationery! Measuring cloth, etc. , all need to use mathematics. This semester, the teacher taught a new knowledge, that is, the multiplication and division of decimals. This knowledge helps me a lot!
Last night, my mother and I went to buy oranges. A kilo of oranges 1.8 yuan. My mother bought 4.5 kg, which should be 8. 1 yuan. But the clerk was careless and didn't know how to calculate it, so it became 9 yuan money. Fortunately, this semester, I used the knowledge of Protestantism, and after doing a calculation in my mind, I immediately corrected the salesman's mistake.
Not only did my aunt, the shop assistant, praise me for my cleverness and my ability to multiply and divide decimals in such a small city, but my mother also praised me for saving her 0.9 yuan on the way home, and the knowledge I learned can be applied in my life.
5. Grade five math diary has 300 words.
On this day, I came across such incredible data in a book: "A piece of paper with a thickness of 0.0 1 cm is even thicker than Mount Everest after being folded in half for 30 times?" This data is a bit "absurd" no matter how you listen to it. After all, it is a thin piece of paper. Can folding in half really surpass Everest? But many unexpected things may happen, so only through calculation can we uncover the mystery of all this.
Immediately I multiplied 0.0 1 cm by 2,1* * 30 times to get10737418.24cm.. Then I converted the height of Mount Everest from 8848.13m to 884813cm. By comparison, it is obvious that the thickness of paper folded in half for 30 times is indeed better than the height of Mount Everest, which is more than 10 times of the latter.
In fact, amazing data like this are everywhere in ordinary life, as long as you have a pair of eyes that are good at discovering.