In life, mathematics is everywhere. For example: buy food! Buy stationery! Measuring cloth, etc. , all need to use mathematics. This semester, the teacher taught a new knowledge, that is, the multiplication and division of decimals. This knowledge helps me a lot!

Last night, my mother went to buy oranges together. A kilo of oranges 1.8 yuan. My mother bought 4.5 kg and should pay 8. 1 yuan. But the clerk was careless and didn't know how to calculate it, so it became 9 yuan money. Fortunately, this semester, I used the knowledge of Protestantism, and after doing a calculation in my mind, I immediately corrected the salesman's mistake.

Not only did my aunt, the shop assistant, praise me for my cleverness and my ability to multiply and divide decimals in such a small city, but my mother also praised me for saving her 0.9 yuan on the way home, and the knowledge I learned can be applied in my life. Yes! If you don't learn this math well, it's not only 0.9 yuan that will lose, but also hundreds, thousands or even hundreds of millions!

On Sunday morning, my grandfather and I went to the pharmacy in the lotus pond and bought two boxes of pills-two boxes of Weiershu, one box of 44 yuan and one box of 22 yuan. Grandpa gave her 50 yuan, and the clerk gave it to Grandpa 6 yuan. After I found the change, I calculated it with decimal addition and subtraction. Grandpa can also pay like this: 1. Give it to 40 yuan, the shop assistant, and then pay 5 yuan. The asking price is 1 yuan. 2. If Grandpa has change, he can pay 40 yuan first and then 4 yuan. By buying medicine with grandpa this time, I know that mathematics is closely related to our lives.

On Sunday, my sister and I went shopping in the supermarket. I bought a pack of beef jerky, a bottle of milk and a bottle of soda. 10 yuan. Zhao Lin bought a box of biscuits, a bottle of soda and a piece of 9 yuan money. We gave the shopkeeper 20 yuan money. The shopkeeper gave us 2 yuan money. When we were ready to go home, Zhao Lin said, "I still want to buy 10 bubble gum." I took out the money and found that the shopkeeper gave me 1 yuan. Let's go back and return the extra 1 yuan to him. The shopkeeper praised us as an honest boy, and our hearts were filled with joy.

Yesterday, I got 95 points in math. I made a mistake in filling in the blanks and writing questions. The teacher reviewed the fill-in-the-blank questions for us before the exam. I didn't recite it carefully, but I remembered it carefully. I was thinking about something else when I recited it, and I didn't remember it at all. So when I took the exam, I couldn't remember it anyway, so I wrote a "number size" casually. I didn't see the meaning of the title clearly, and it was wrong to write "X" as "⊙". This grade, the first 1 question is because my attitude is not correct, and the second question is because I didn't review it carefully. I will definitely do these two things in the future, but I can't be careless. Teacher, I can't get satisfactory results in every exam. Since I took interesting math, I understand that the most important thing in learning math is understanding. It's no use just copying other people's answers. It's no use copying them. So I will listen carefully in the future and strive for excellent results.

Yesterday, I got 95 points in math. I made a mistake in filling in the blanks and writing questions. The teacher reviewed the fill-in-the-blank questions for us before the exam. I didn't recite it carefully, but I remembered it carefully. I was thinking about something else when I recited it, and I didn't remember it at all. So when I took the exam, I couldn't remember it anyway, so I wrote a "number size" casually. I didn't see the meaning of the title clearly, and it was wrong to write "X" as "⊙". This grade, the first 1 question is because my attitude is not correct, and the second question is because I didn't review it carefully. I will definitely do these two things in the future, but I can't be careless. Teacher, I can't get satisfactory results in every exam. Since I took interesting math, I understand that the most important thing in learning math is understanding. It's no use just copying other people's answers. It's no use copying them. So I will listen carefully in the future and strive for excellent results. Yesterday, I got 95 points in math. I made a mistake in filling in the blanks and writing questions. The teacher reviewed the fill-in-the-blank questions for us before the exam. I didn't recite it carefully, but I remembered it carefully. I was thinking about something else when I recited it, and I didn't remember it at all. So when I took the exam, I couldn't remember it anyway, so I wrote a "number size" casually. I didn't see the meaning of the title clearly, and it was wrong to write "X" as "⊙". This grade, the first 1 question is because my attitude is not correct, and the second question is because I didn't review it carefully. I will definitely do these two things in the future, but I can't be careless. Teacher, I can't get satisfactory results in every exam. Since I took interesting math, I understand that the most important thing in learning math is understanding. It's no use just copying other people's answers. It's no use copying them. So I will listen carefully in the future and strive for excellent results.

Recently, our students from grade three to grade six took a math test. I only got 92.5 points in this exam. Carelessness made me do a lot. You're right. It's not that I can't. It was careless. There are often some size problems. Without these problems, I would be better. There is a saying: "The first mistake may be excusable, but the second mistake shows that you are a' fool'." Maybe I am this "idiot". My grades are like an olive. Olives hang from the cliff. If you are not careful, you will "bump into …" and fall down. Achievement depends not on thinking high, but on hard work. An ideal without action is a fantasy. As Nietzsche said, the value of a thing sometimes depends not on people's income, but on people's efforts-on how much you have paid for it. This sentence is correct. Wisdom does not lie in profound knowledge. We can't know everything. Wisdom lies not in knowing as much as possible, but in knowing what we need most and what we don't need to know. Through this exam, I not only tested what I have learned recently, but also exposed many shortcomings of myself, so that I can correct them in time in my future study.

After this test of curly hair, I found that my carelessness was not committed, but not so serious. The seventh question of the fill-in-the-blank question is a special part of the book, which is all my mistakes that I didn't read carefully; There is another question in the third part of the third question that is wrong because you don't look at the problem carefully and think it can't be worked out easily; I shouldn't make mistakes in thinking training. I should know all those questions. Just because of the wrong idea in my mind, I think this question is too simple, so I chose the wrong one. Not only did I make mistakes in exams, but I also had many jealousy problems in my daily life. For example, when I am writing, I often make careless mistakes and make mistakes. Later, I checked and found that I often do my homework and play for a while, and I am most likely to be careless, half-hearted and make mistakes. But now that I've got rid of my half-hearted problem, I believe I'll be better after I get rid of other problems.

We had a monthly exam the other day. I'm very nervous after I finished my math exam. I'm afraid I won't do well in the exam! The results came out yesterday, and I can't wait to know my own results. At 95 minutes, I finally breathed a sigh of relief. I finally put down a heavy stone. After the papers were handed out, I carefully analyzed the reasons for the mistakes as before. I sighed deeply and said, "Ah, I shouldn't be wrong in the two questions, and I believe in myself. I will definitely get 100." However, I am so careless, as if I were going to make a few mistakes! I think: I must remember this lesson and let it remind me at all times that I will not be so careless in the next exam, and I must get the best "100"! From this math monthly exam, I understand that no matter what I do, I must believe in myself and be a confident and good student.

Today is Friday, and the test paper has been handed out. When I saw the results, I couldn't believe my eyes, only 86 points short. I am really ashamed and envious to see that others got a score of 100. I wish I could get a score of 100. But I blame myself for being careless, and I also blame myself for suddenly having a stomachache before I finished checking the first half of the test paper. I really don't know what happened. And I clearly found a problem wrong, but I didn't have time to correct it. The question is 4 points. If I add up the scores of this question, I can get 90 points. This exam taught me a lesson: don't eat anything except dinner before the exam. And the check is to write quickly and carefully, don't write typos, or the right one will become wrong, and count it several times. Write the answer quickly and not carelessly, because there is still time to check later. I will work harder this month, because I will face a final exam instead of a quiz. I will definitely work hard and try my best to get better results in the exam.

Today, the teacher asked us to verify the constant law of quotient in division with a calculator. I gave several examples, such as: Example 1: 16 ÷ 2 = 8 cases 2: 6 ÷ 2 = 3 cases 3:1200 ÷ 200 = 6160 ÷ 20. From the above example, I know that in division, the dividend and divisor are expanded (or reduced) by the same multiple at the same time, and the quotient remains unchanged.