Change my math diary!!!!!!!

Saturday, February 25th, 2012 Weather: Sunny.

This morning, we had a very interesting math class, and the teacher taught us not only the decimal point, but also the addition and subtraction of decimal numbers. Although the decimal point is not very tall, it is very interesting to jump, one step to the right is ten times larger, and one step to the left is immediately ten times smaller, which is very interesting. In class, I also learned about the nature of decimals:

Add "0" to the end of the decimal or remove "0", and the size of the decimal remains unchanged. Removing the "0" at the end of the decimal simplifies the decimal. For example:

The "0" at the end can be changed to the same size. If the "0" is not at the end, it cannot be removed, and the size will be changed if it is removed.

I also understood that 1 decimeter = 10 centimeters = 100 millimeters, so meters = meters, which is the application of decimal properties, can be rooted to grasp the need to rewrite decimals. When reading decimals, the decimal part also reads each number in turn. After this lesson, I learned about decimals.

I learned a lot in this class, and I believe I will use it in my daily life, and next time I talk about mathematics in my life.

A right jump is ten times larger, and a left jump is immediately a tenth smaller" should be 10 times smaller to the left. ”

You can also write about the places where you are prone to mistakes, the role of this knowledge in life, the inspiration you have, etc.

You can write about the questions you have while practicing.

Write more about your experience in this area.

Today, I saw a question in the mathematics textbook "Mathematics problems in life". The title is: "Our country has a population of about 1.3 billion, if we save 1 dime per person a day, if we make this concession, our country will save about 13 million yuan."

Wouldn't it be great if elementary school students had to save about 10,000 yuan from the first grade to college, and that money could be given to 1,805 children who had dropped out of school and had no money to go to school? ”

After reading the above information, I thought: there is really a lot of power in people. Suddenly I remembered, there is great power in numbers?

It's not good, because I thought about it: if the 1.3 billion people waste 1 drop of water, then about 1.3 billion drops of water are wasted, then think about how much 1.3 billion drops of water weigh?

I did a little experiment: I put 1,000 drops of water under the faucet, weighed it with a scale, and 1,000 drops of water weighed 200 grams, and I did the math again.

1300000000 1000 200 = 2600000000 (grams).

260000000 grams = 260 tons.

It's really not that I don't know, but I'm shocked: if each person uses one ton of water a month, then 260 tons of water can be used for two years. I'm going to ask my dad:

How many kilowatt-hours of electricity can be generated from 1 ton of water? Dad said, "1 ton of water can generate 100 kilowatt-hours of electricity."

That means that 260 tons of water can generate 26,000 kilowatt-hours of electricity.

Wow! I was stunned that 260 tons of water could play so many roles! So now we have to save all the water, don't waste a drop of water, we have to develop a good habit of saving, we can't waste it anymore.

Comments]: Having environmental awareness from an early age and having the spirit of environmental protection is a necessary quality for a new generation of citizens. It's very convincing that you can use your math to explain the importance of protecting the environment.

"Moore Manor" is a very popular game among our elementary school students, which allows everyone to relax after intense studying. At the same time, I also found that "Moore Manor" also contains a lot of mathematical knowledge, which can also improve our mathematical level in addition to the game.

I don't have furniture in my home in the game, and in the "Magazine" of the game, I found a beautiful set of small furniture worth 3300 mole beans, however, I only have a deposit of 3000 mole beans, what should I do to buy this set of furniture?

So I used my brains and found that there is interest on moore beans deposited in the bank, and the interest rate is 3% per day, that is, my 3000 mole beans are deposited in the bank, and the daily interest is: 3000 * 3% = 90 mole beans.

A day later, my deposit became: 3000 + 90 3090 mole beans;

Two days later, my deposit became: 3000 + 90 2 3180 moles of beans;

After three days, my deposit became: 3000+90 3 3270 Mole Beans;

Four days later, my deposit became: 3000+90 4 3360 moles of beans.

After the fourth day, my deposit will be able to pay for the furniture!

I think there is mathematics everywhere in life, including games, as long as we use our brains, many small problems in life can be solved with mathematics!

There's really nothing wrong with your question.

It's just that I'm just in high school, and I'm not very used to high school, especially the way high school teachers teach.

In addition, the pace of the teacher's lectures is relatively fast, and I always feel that I can't keep up.

Take your time, don't be too anxious, just listen carefully to the lecture and you'll be fine later.

Do not worry.

Do more questions, find patterns, and summarize more.

I still agree to read more mathematics textbooks, because there are the most basic principles, the origin of the formula, first of all, we must understand this further before we can use and do problems, and then we should do more questions, and ask teachers and classmates if you don't understand it, don't be shy. In high school, you should maintain a good attitude, have a normal heart, learn more from your classmates around you, and learn from their good study methods. There is also the need to work hard, cherish time, and seize the time.

Study when it's time to study, and rest when it's time to relax. Don't think that your classmates' grades are so good, in fact, you just don't see them working hard, just like when someone sees others being rich and rich, they envy others, but they don't see that others have worked hard, worked hard, and pretended to be grandchildren! This is my experience, and I am here to tell you all about it, even though we don't know each other, I hope it will help you.

There is indeed a certain difference between middle school math and high school math. High school math needs to do more practice questions to help understanding. But too many dead questions are not good, you must understand the reason, or ask a one-on-one tutor, maybe it helps.

In the case of a math diary, it means that you have done something related to math today, such as going grocery shopping or shopping, or doing some math homework.