Elementary school sixth grade math essay 1
One day, I was doing my homework. My mother suddenly said to me: Stand out, are you preparing for the math contest now? I want to test whether you really know it.
? All right. I said.
? I saw a topic on a test paper recently. The number of A is 3 times that of B. If B gives that the number of A is 6 and the number of A is 5 times that of B, what are the numbers of A and B?
I thought about it and said, I really can't. Can you teach me? He said that the number A is three times that of the number B, so we divide the number B into 1 times, the number A is three times, the number B gives the number A 6, and the number A is five times that of the number B. From this, we can think that if the number B is subtracted from the number B, the number A will add 6. Now, the number A is more than three times that of the number B. We can divide the number A into as many as the number B, and all six can be removed, so we can remove three sixes. Then divide 30 by 2 equals 15, 15 plus 6 equals 2 1, and find the original number b, then the number a is easy to find. I won't say it now. Can you find the number a?
? It's too simple. 2 1 times 3 equals 63, the number a is 63 and the number b is 2 1. Yes, it's so easy! ? I was so ecstatic that I couldn't wait to jump.
Mom said:? As long as you think more and think more, everything will become simple. ?
? Oh, I'll try. I'll be chosen. ?
Essays on mathematics in the sixth grade of primary school II
? Mathematics comes from life and also serves life. ? Mathematics often passes people by, and people can't live without it. It has made great contributions to people's lives. Mathematics is often used in our class, such as calculating the average score of the unit and counting the campus electricity bill, which is closely related to our lives.
Once, my parents and I went shopping and bought candy for the New Year. There are many kinds of candy in the supermarket, including crisp candy 15.80 yuan a catty, cowhide candy 10.50 yuan a catty, milk candy 8.00 yuan a catty, crisp candy 23.9 yuan a catty, chocolate candy 2 1.9 yuan a catty, but they are mainly divided into bulk weighing and packaging. My parents asked me, son, what kind of sugar do you want to buy? I look at the beautiful flowers. Candy world? I don't know what to choose, but I like chocolate since I was a child, so I chose chocolate candy. At this time, my mother gave me another question. He said: That son, do you think we should buy a loose scale or a packaged one? I'm at a loss. I immediately figured it out: 2 1.9 yuan a catty, packed 58.9. A packet of loose chocolate candy is only 10g, and a box of packaged chocolate candy is 1000g! However, just looking at the weight can't determine the outcome. Let me calculate it carefully. Actually, this is not difficult to calculate. Just use 1 000g = 1 kg1kg = 2kg58.9? 2=29.45 (yuan) 29.45 yuan > 2 1.9 yuan, so bulk is more cost-effective than packaging! I'm glad to tell my mother the result I got. My mother nodded happily and praised me for thinking, so I became my mother's "little accountant".
In life, everything can be changed from an ordinary trivial matter to a vivid math problem. The applied problems that we often do are the problems that are made from materials in life and then slightly adapted. No, I found an interesting question when I was doing a math problem:
There is a bridge across the river from east to west, and people will arrive in five minutes. There is a pavilion in the middle of the bridge. There is a night watchman in the pavilion. He comes out every three minutes. When you see someone passing by, tell him to go back and not go there. A clever man who crossed the bridge from east to west thought of a clever way and finally crossed the bridge.
I didn't have a clue when I first looked at this problem. Can I go there by boat? It is out of the question. Did you go back after a while? Well, it seems to work.
After repeated calculations, the first time I thought about turning back when I walked to 2 minutes and 59 seconds, the guard would let me go back. Isn't that the past? Later, I thought about it for a while and came to the conclusion that as long as I walk for 2 minutes and 30 seconds to 2 minutes and 59 seconds, I will go back (it is best not to walk for 2 minutes and 59 seconds, because maybe the guard will find out before you turn your head. ), you can cross the bridge smoothly.
Everyone will definitely say that anyone can do such a simple question. What am I bragging about? No, you are wrong. I'm not showing off. I tell you, mathematics is to think in connection with life, to understand wholeheartedly, not to show off other people's achievements.
What problems should be paid attention to in primary school mathematics examination papers
1. Pay attention to the actual level of students, step by step. When you start writing, don't start too high. The choice of writing content and form should not only consider students' actual ability and level, but also consider whether students have the ability and conditions to observe, test and experiment. Without practical and reliable material data, it is impossible to write articles with scientific value. The value of a math paper has little to do with the size of the topic, and a small topic can still write a big article. Beginners had better discuss one problem at a time. The topic is time-consuming and laborious, and it is not easy to make it clear, so it is often impossible to write it. The topic is narrowed, the argument materials are easy to collect, and the writing difficulty of the article is also reduced, which is conducive to students' participation.
2. Pay attention to the practical mathematics around students and make it practical. Primary school students have limited mathematical knowledge, energy and time. Teachers should pay attention to closely combining students' study and life reality when instructing students to write math papers. Teachers can guide students to choose some topics, so that students can write according to their own personal experiences, which is easy for students to accept and understand and is conducive to writing. For example, after learning the area unit and the area of rectangle and square, let the students measure and estimate the area of desks and classrooms themselves, and write the process of practical activities into mathematical papers. For another example, in order to educate students to save food, students can investigate and count how many kilograms of food are wasted in the school cafeteria every day, and what can be used for the food saved by the school in one year. Only in this way can students have activities, thinking and content to write.
3. Pay attention to cultivate students' sense of participation, and let students actively write math papers. The subject of teaching is students. Only when students actively participate and turn math papers into conscious actions can this activity achieve the expected results. The purpose of writing is to improve students' learning enthusiasm, change passive learning into active learning, and cultivate students' autonomous learning ability and innovative consciousness. Due to the limitation of primary school students' knowledge and ability, most students are unlikely to write high-level compositions. For students, the greatest significance of writing mathematical papers is participation. In the process of participating in writing activities, students' ability is improved and their talents are displayed.