Mathematics is a subject. Some people say it is terrible because it is difficult. Some people say it is lovely because it has fun. The following is a 600-word model essay of the first-grade math weekly diary. Welcome to read and learn from it. I hope I can help you.

Mathematics Weekly Record of Senior One, 600 words, a familiar word, ordinary and beautiful. You might say:? Mathematics is just a few Arabic numerals, and it is also beautiful. However, it is its simplicity that makes it beautiful and magical. Knowing math is the easiest thing, right? 1、2、3? Is this the math I imagined? However, I was wrong. What I see is only the surface, and there is a deeper meaning. The difficulty of mathematics is gradually deepening. From addition, subtraction, multiplication and division to decimals and fractions, the mystery and beauty of mathematics are gradually presented to me. Mathematics is like a big group, and numbers are like happy spirits, dancing all day. ? 1? It is their eldest brother, who keeps a straight body and looks majestic; And then what? 2? Just like a quiet girl, twisting her body and looking shy; ? 3? He is a strong young man, optimistic by nature and ambitious. Other brothers and sisters are even more delicate and delicate, each with unique skills. These ten elves get along day and night, unite as one, and sisters see too little. They will also self-assemble and produce new numbers!

Do you see it? 1? Goodbye? 0? If a person is too lonely and timid, he will take the initiative to combine with it and stay with it. 10? . Other brothers and sisters were inspired and responded in succession, and huge numbers spread all over the world. It is not enough to have numbers in the composition book. The elves felt that it was not lively enough, so they invited more playmates. As a result, the decimal point came, the score came with the family, and the letter was invited. Everyone invited came from all directions. The kingdom of mathematics is very lively!

However, despite coming, the naughty nature still cannot be changed. Do you see it? Naughty boy? Decimal point while the owner is not paying attention, from? 2? Do you jump around? 3? In front of ... Seeing the owner anxiously looking for it, it laughed at the side, just like playing hide-and-seek with the owner. For this reason, I was fooled by it. Do you see it? Victory? After the triumphant appearance, I made up my mind: I must form a good habit of being careful and catch this naughty decimal point!

At noon today, in order to measure the size of chopsticks more accurately, I took a slender measuring cylinder with smaller scale units, each unit is only 1 cubic centimeter. At this point, I seem to feel victory beckoning to me. I really have everything except hands-on experiments.

First of all, I drew a dividing line on disposable chopsticks with a pencil, divided the chopsticks into two sections evenly, and soaked them in water to prevent the chopsticks from absorbing water during measurement. Then, insert chopsticks into the measuring cylinder, drop water into the measuring cylinder with a dropper, let the water in the measuring cylinder rise to the dividing line of chopsticks, record the water level scale (38 ml), then take the chopsticks out of the measuring cylinder, and then record the water level scale in the measuring cylinder. The difference between the two water level gauges is the volume of chopsticks, which is 3. 5 cubic centimeters. In the same way, I measured the volume of the other part of the chopsticks to be 5 cubic centimeters, and the volume of this pair of chopsticks was 8 by adding the two measurement results. 5 cubic centimeters. When I got the result, I cried excitedly. How proud and proud I am at this time!

Then, according to the situation that each person uses three pairs of chopsticks every day, I calculated the disposable consumption of chopsticks in our school and the whole country for one year (65.438+0.2 billion), which are cubic meters and cubic meters respectively. The result surprised me. What a pity to waste so many wooden disposable chopsticks every year! I hereby appeal to the students at school, no! It is the people of the whole country, and it is not! Everyone in the world should stop using disposable chopsticks. Only in this way can we protect our forest resources, make our earth environment better and let everyone on the earth breathe clean and fresh air.

Our family traveled to Sanya in the third summer vacation.

At Nanjing Lukou Airport Terminal, my father asked me: The speed of the plane is 800 kilometers per hour, and it takes two and a half hours to fly from Nanjing to Sanya. Can you tell me the distance between these two places?

? The speed of the plane is 800 kilometers per hour, two hours is 1600 kilometers, and the remaining half hour is 0.5 hours, so 800 times 0.5 equals 400 kilometers, and the sum of the two is 2000 kilometers. ?

? Not bad! ? Dad kept asking: How long does it take for the plane to accelerate to 1000 km/h?

I quickly came to the conclusion:? 2000 km divided by 1000 km equals 2 hours. ?

? If the plane is faster, 2000 kilometers per hour, how long will it take?

? We only need an hour. ? I think the question is too simple.

Dad smiled and nodded? But mom doesn't like flying. Do you have any good ideas?

? Since mom is afraid of plane crash, hee hee! You can only ride a donkey! ? I made a joke.

? If a donkey can walk about100km every day, how long will it take to get to Sanya?

? Twenty days. ? We always play for five days, but it takes her more than 20 days to go to Sanya by bike. By the time she arrives in Sanya, my father and I may have returned to Nanjing!

? Did you find any patterns? That's what dad really wants to ask.

? Under the condition of constant distance, speed and time are inversely proportional. That is, the faster the speed, the shorter the time it takes. Conversely, the slower the speed, the longer the time. ? I thought about it and said.

? Great! ? Dad praised me for understanding correctly. You see, math is actually quite interesting! ?

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