The speed of time equals the distance. Essay 1 "The race in sports is to see how much time you spend in a limited distance; The race of life is to see how many miles you have run in a limited time. "
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Once, in the last semester of the fifth grade, the math teacher taught us: "To find the length of a road, that is, to find the distance, it takes time to multiply the speed;" On the contrary, to know how long it will take to reach the finish line, we must divide the distance by the speed ... This formula can be used to solve such problems, but their ideas are similar. "These words have been in my mind.
Until today, I saw the essay question of 20 12 college entrance examination, and I feel the same way: running at a known speed within a known distance depends on how long it takes you. This is "distance-speed = time".
So, what about the race of life?
Once, I read a story in a magazine: a disabled female leopard living on the grassland tried her best to take care of her two cubs. It runs around with only three legs every day to find food for its cubs; Sometimes, it will resist the invaders scarred ... but not discouraged. For its beloved children, it runs day after day, year after year-even if it is not rewarded, even if it will be exhausted in a corner of the grassland, it still persists. This disabled female leopard ran tirelessly in her limited life and wrote a hymn of maternal love!
Beethoven, a famous pianist, was deaf in his later years, which even seriously affected his normal life. After being cut off from sound for 25 years, he still worked hard to create world-famous masterpieces such as Moonlight Sonata, Ninth Symphony and Symphony of Destiny. Beethoven, he didn't live long, but he ran such a long way in his short life! His name is immortal because of his brilliant music!
Perhaps, in front of so many great men, I seem very small; Maybe, I can't make much contribution in my life. However, I will not give up. I have been working hard, struggling and running on the road of life! I believe that I can run out of my wonderful life with limited time and limited speed!
I learned a new knowledge today, which is a simple addition and subtraction algorithm. After learning the simple addition and subtraction algorithm, my calculation speed is much faster and it is easier to learn to calculate. Give an example! For example: 367+498=? I just have to think like this: add up 498 to make 500, and then use 367+500. I found that I added 2 more, so I subtracted 2 from the total to get 865. And 796+295? I think so: 796 can be added to 800, 295 can be added to 300, one plus 4 and one plus 5, then the formula becomes 800+300-4-5 = 109 1. Look, how convenient it is!
After learning the simple algorithm of addition, learning the simple algorithm of subtraction will be much easier. Such as: 483-299, hehe, you can find the way by gently moving your head. I'll take 299 and subtract it from 300, because it's 1, so just add 1 to the result, which is 483-300+ 1 = 184, and the calculation is much simpler. However, I can warn you: it's best not to think about the minuend when doing subtraction, or you'll be in trouble! Now, I like math more and more, because it makes me learn to calculate the results quickly, and math really makes me remember deeply.
Time speed equals distance. I solved a math problem by myself this afternoon. This math problem gave me some inspiration.
2: 00 p.m.15, just woke up and took a lunch break. I got dressed, sat in my seat, opened Happy Winter Holiday and finished my homework according to today's plan. When I did the third problem, I found it was a difficult math problem. The topic is like this: Dad suggested that because it is winter and the family is going to travel, they should buy snow boots, winter clothes and so on. He drove his family to the shopping center to buy things. When he went, the speed was 40 kilometers per hour. He drove 1 hour for 30 minutes. When he comes back, it only takes 40 minutes to take the expressway. If the round trip is the same, what is his speed when he comes back?
I thought for a while, but I couldn't figure it out, so I put this difficult problem down and did other relatively easy topics first.
After a while, I remembered the topic of distance and speed again, and worked it out with draft paper:
1 hour 30 minutes = 1. 5 hours, 40 km/h×1. 5 hours =60 kilometers (total distance),
40 minutes is two-thirds of 1 hour, 60 ÷ 2 = 30km, 30× 3 = 90km ∕ hour (return speed).
It's 90 km/h when I look at the answer at night.
This little inspiration is that when encountering difficulties, do the easy ones first, and then settle down to overcome the difficult problems, so as to get twice the result with half the effort!
Time equals distance. Some time ago, I was lucky enough to participate in the teaching and research activities organized by the school, and went to Zhuangzi Primary School to listen to a math class of Yu Na. After listening to it, I benefited a lot and gained a lot.
First of all, the course begins to review and introduce in the form of oral calculation questions, using the form of solitaire that we often use. Then, let's review the quantitative relationship between unit price, quantity and total quantity that we have studied before. When answering questions, let students look at the questions first, tell the quantitative relationship used, and speak loudly at the same table, so that every student can participate, which is very worth learning. Then, introduce new knowledge and write it on the blackboard first, so that students can find out the similarities between the two questions and mark them with key symbols, thus leading to the focus of this lesson-speed, time and distance, deducing the quantitative relationship back and forth, making students deeply impressed, practicing and checking in time, finding and solving problems in time, realizing efficient classroom and giving students a standard answering mode. Every time they do a question, they should use a pen.
After listening to the whole class, Mr. Yu Na's curriculum is very tight. Efficient classroom can not only make students remember new knowledge in the whole class, but also transfer old knowledge for review. Why can Mr Yu Na make his classroom an efficient classroom in our dreams? I summarized the following points:
1. Classroom discipline. No student in the class is in a state of thinking. All eyes were fixed on the teacher. No matter where the teacher points, the students can do it at once. I think this is the first condition to make this class an efficient classroom.
2, behavior habits, the whole class every student didn't do little tricks, also didn't whisper in private, language organization to answer questions let every teacher here deeply admire us, it can be seen that Yu Na's kung fu at ordinary times is extraordinary.
3. Teacher-student relationship. From entering the classroom, seeing the state of students and teachers getting along, seeing the smile on the teacher's face, and calling children's nicknames when asking questions in class, we can feel a harmonious relationship between teachers and students. This is a loving family.
In a word, I realize that I still have a lot of experience to learn from Mr. Yu Na, and I hope I can continue to communicate and learn in the future.