I love math composition 1 Mathematics is always so wonderful, so magical, it is like my good friend, which makes me get a lot of happiness in my study.
Tonight, my mother and I compete to do oral arithmetic. After I finished, it took me 1 1 minute, while my mother only took 9 minutes. I asked my mother curiously, "How do you count so fast?" Mom said, "I use multiplication and division for simple operations." After my mother taught me this method, I suddenly realized that some calculation problems are like the face-changing of traditional Chinese opera. They always appear as ordinary faces, but there are hidden mysteries in their hearts. Take 450 ÷25 as an example! We should use 450× 4 = 1800 first, then 25× 4 = 100, and finally1800 ÷100 =18. In division, divisor and divisor expand or contract the same coset at the same time. Using this property, many such calculation problems can be simplified. I'm really glad to try to do more correct questions.
As long as you understand the laws of mathematics and master its temper, you will be handy when doing problems.
I love math composition 2 Looking around, the sun just appeared, the gentle tassels of the sun fell to the ground, thick fog rose behind the yard, surrounded by pink cherry trees, the fresh air was a little damp, birds were singing, and the earth was tightly surrounded by smoke. Gradually awake, I opened the window and looked out. Ah! How poetic all this is, I was fascinated by it and couldn't take my eyes off it for a long time. Cherry blossoms are looming in the fog, like many fairies in a fairyland, all graceful but a little ethereal, just like in real life, there are always some inexplicable things. Such a quiet morning reminds me of math.
I think, in my study process, the most painful subject should be math, as if every time I open my math homework, I will see the numbers spinning wildly and twisting my body like a carnival party; This equation is like transformers, constantly changing, appearing alternately at both ends of the equal sign ... It really makes me dizzy to see such a sight. Every time I try to understand them, they instantly become thousands of huge question marks, and my thoughts are getting thicker and thicker like wisps of mist ... so thick that I can't see and guess! There are so many things, but I can't figure out why, and I am gradually lost in this white fog and can't extricate myself. This torture is really worse than death!
Especially in the exam, every minute counts. When I see that time is running out, I think hard about the questions I don't understand and sort out some clues, but I get nothing. I'm really flustered at the moment. I feel helpless at the thought of my score being swallowed up bit by bit.
I believe that when a person is lost in the fog around him, what he needs most is help! Therefore, in order to defeat this "mathematical demon", whenever I have a math class, even though the teacher's high-decibel microphone makes my brain buzzing and dizzy, I still try to cheer up and listen carefully; When you encounter difficulties in your homework, ask your friends and teachers for help. Don't let yourself fall into the fog and continue to be decadent.
When I changed my view on mathematics and took the initiative to ask for help, I gradually walked out of this dense fog, as if there was an invisible compass guiding me out of the opaque white. Now I'm not just worried about math. I've been waiting for this moment by my own efforts. I'm greeted by brilliant dawn and brand-new hope, just like this fog in front of me, which will gradually disperse when the sun wakes up.
I like math composition 3. How happy I am today! Math class is a practical activity class-catching soybeans, and the students are very busy. We divided into groups of 8 people, and then the members of each group worked together under the leadership of the group leader, trying to estimate how many soybeans were in 1 kg. According to the estimation method introduced in the book, it seems not difficult, but it is necessary to be careful to minimize the error.
The method I suggested is that the amount of cups used by our group will be more accurate, but unfortunately we can't find any cups. Later, our group chose the method of hand grasping, and the group leader Ke was responsible for grasping. Oh, dear! I really didn't see it. Ke Zi Rong's little hands are quite big! One catch is 180 grains, and 30 consecutive catches have just finished 1 kg of soybeans. "We finished, we succeeded", a smile climbed on the students' faces, and everyone was extremely happy. Next, through calculation, we get that 30 tablets 180 equals 5400 tablets. So I know there are about 5400 1 thousand soybeans.
This practical activity inspired me. I can try melon seeds, candy, peanuts and so on in these ways. And I can use this method to estimate more data. It seems that there is still a lot of math knowledge hidden in my life!
I like math composition 4. I'm crazy about math. I can do 100 math problems every day, which is still relatively small. I want to exert all my strength to do 10,000 math problems one day and 40,000 math problems two days.
One day, the teacher assigned a hundred math problems, and all the students were very sad. Only I laughed. I said, why are you unhappy? Some students said, "This is too much. My mother asked me to do a hundred math problems in five minutes!" " "I said happily," You don't want to do so many math problems, I can help you! " "So I finished the math problem in our class at once! The students' mouths are open enough to swallow an earth.
I have done a lot, so nothing is difficult for me. On an exam, more than half of the students didn't work out a particularly difficult problem, but it was very simple for me. After the exam, the students were very nervous. They said, "That particularly difficult math problem is 30 points." When I handed out the test paper, I was the only one who got a hundred points. The teacher asked me how this problem was worked out. When I talked about the method, the students all thought it was particularly simple.
I like math better! In the end, all the math problems in the world are not enough for me to do.