2 short essays on 6th grade math

1 Today I went to my grandmother's house and found a large right-angled triangular ruler on my grandmother's table, with two right-angled sides of 50cm and 25cm respectively, so I calculated that its area is 50*25=1250 square centimeters.

2 Today my father gave me a reflection question, which is 1+2+3+......I thought about it for a long time, and finally I knew that 1 + 100 = 101, the same way 2 + 99 = 101, a total of 50 101, so the result is 50 * 101 = 5050, wow, math is amazing!

Pure hand-hitting, self-written, hopeful.

I don't understand, do you want a little story about math?

Don't be lazy, children, just write whatever you want!

The 6th grade math ** is written as follows:

Life is full of mathematical knowledge, which is not only interesting but also has an important place in our lives. Without these seemingly simple numbers, we would not be able to live our lives as normal. It can be seen how important mathematics is in our lives.

For example, bank deposits are divided into various forms of deposits, such as lump sum deposits, lump sum deposits, fixed deposits, demand deposits, and treasury bonds, and the interest rates are also large and small

Principal Interest Rate Time = Interest Earned, and then 20% of the interest will be deducted from the interest to pay taxes (except for government bonds), and the remaining 80% of the interest is the interest you deserve.

In addition, the various things invented by scientists, and the weather conditions measured by meteorologists, need to be carefully thought out and carefully calculated to get the correct answer. Even if you accidentally write the wrong decimal point, all your efforts will be wasted.

There are also astronauts who are constantly soaring in the sky, and they have to operate hundreds of instruments composed of numbers, and if they are not careful, the result will be the destruction of the plane and the death of people. It can be seen that mathematics is indispensable in our lives, and we must not be careless, otherwise it will cause serious consequences.

Mathematics is not only about these values, but we can see and use them everywhere in our lives. For example, farmers use geometric shapes to make the farm more beautiful and better managed; Engineers use scales to give people a better understanding of the coarse stuff pat; The four calculations used by merchants and farmers are to calculate the value of the commodity more simply and accurately; All kinds of statistical tables are produced for better statistical information.

Make it clear at a glance; The percentage is used to better calculate the price of the product after discounting; These calculations of surface area and the use of the further method are intended to make a good commodity with the least amount of material; The use of the tail removal method for calculating volume or volume is to ensure that the item is stored without spillage; The same type of unit conversion is to facilitate our calculations.

Structure of Math Small**:

Proposition Example**.

Perception Discover new knowledge.

The color of mathematics.

In the early morning, the bright red sun showed half a smiling face, and the harmonious sunlight sprinkled the world, and I was in a really good mood. Suddenly received a ** from my grandfather, telling me to calculate nine yuan five plus ninety-nine yuan five, and I immediately told my grandfather: Nine plus ninety-nine, plus one, isn't it equal to one hundred and nine?

Grandpa said that my algorithm is not a coincidence, and it would be much better if I rounded up and subtracted the fraction. I immediately interrupted my grandfather and told him: 10 + 100 - 1 = 109 (yuan).

At this time, my grandfather praised me and said that I was quite dexterous. It's the morning math problem, and I put the math in red.

In the morning, my father came back from the bank to pay the electricity bill and asked me to calculate the electricity bill. The electricity consumption is from 1079-1279 (kWh), the unit price per kilowatt-hour is yuan, I calculate 200 kWh by heart, I change the unit price to a fraction is 38 100, column formula: 200 (38 100), first approximate and then multiply, equal to 76 yuan.

Dad said yes, it's the same as a computer. I was so proud that it was almost noon and I made the math yellow.

In the afternoon, my sister and I cut the watermelon at home, and cut half of the watermelon evenly in two knives, two of which are 2 3, I asked my sister how many fractions of the whole watermelon are these two parts? My sister is only in the first grade, of course she won't count, I told her to look at the watermelon as a whole as 1, the first score is 1 2, its score is 2 3, the result of multiplication is that these two parts are 2 6 of the whole watermelon, and after about 1 3. At this time, I think my grandfather once said that the seven colors of sunlight are white, so this math should be white.

At night under the blue starry sky, my mother and I watched TV, and I couldn't figure out how archaeologists could have calculated the height of the Great El dinosaur from the fossils of the leg bones. Mom said that when you grow up, this blue math will naturally become more capable of it.

There is simply too much mathematics in life, it is really colorful, and it is always around you. I love math and I want to learn math well.

Feel the math.

I once heard an Olympiad math teacher say that learning mathematics is like a fish and a net; Being able to solve a problem is like catching a fish, and mastering a method of solving a problem is like having a net; So, the difference between "learning math" and "learning math well" is whether you have a fish or a net. Mathematics is a very thoughtful course, and it is very logical, so it will always give people an illusion.

Geometry in mathematics is interesting, and each figure is interdependent, but also has its own merits. For example, circles. The formula for calculating the area of a circle is s= r, and because the radius is different, we often make some mistakes.

For example, "a pizza with a radius of 9 cm and a radius of 6 cm is equal to a pizza with a radius of 15 cm", in terms of proposition, this question first confuses everyone and gives people an illusion, and cleverly uses the area formula of the circle to make people produce a wrong balance. Actually, a pizza with a radius of 9 cm and a pizza with a radius of 6 cm is not equal to a pizza with a radius of 15 cm, because the area of a pizza with a radius of 9 cm and a pizza with a radius of 6 cm is s= r = 9 +6 = 117, while the area of a pizza with a radius of 15 cm is s= r = 15 = 225, so a pizza with a radius of 9 cm and a pizza with a radius of 6 cm is not equal to a pizza with a radius of 15 cm. Mathematics, like a peak, straight into the sky, just started to climb, it feels very easy, but the higher we climb, the steeper the mountain becomes, which makes people feel frightened, at this time, only people who really love mathematics will have the courage to continue climbing, so people who stand on the peak of mathematics love mathematics from the bottom of their hearts.

Remember, the person standing at the foot of the peak cannot see the peak.

In the past, I always thought that learning the knowledge of "finding the least common multiple" was boring, and dealing with problems like "finding the least common multiple of 11 and 12" all day long was really annoying, and I always felt that learning this knowledge was useless in life. However, one thing changed my perspective. It wasn't that long ago, and my grandfather and I took the bus to the Youth Palace.

We took the No. 3 bus, and when we were about to leave, the No. 1 bus happened to depart at the same time as us. At this time, grandpa looked at the two cars, and suddenly said to me with a smile: "Xiaowei, grandpa has a question to test you, okay?"

How many minutes after these two buses can depart at the same time? After a pause, I said, "Grandpa, you can't answer this question."

Grandpa looked at me suspiciously: "Oh, really? "There is one condition missing from this question:

The starting point of bus 1 and bus 3 is the same place. Grandpa listened to my words, suddenly realized that he patted his smart bald head, and said with a smile, "I'm this."'Ph.D. in Mathematics'There are also times when I am confused, and the questions are not rigorous enough, but Xiao Wei thinks about it thoroughly.

My grandfather and I laughed happily. At this time, Grandpa said: "Okay, now let's say it's the same starting point, what method do you use to solve it?"

I thought about it for a moment and blurted out, "In 15 minutes." Since 3 and 5 are coprime numbers, finding the least common multiple of the coprime number is equal to the product of these two numbers (3 5 = 15), so 15 is their least common multiple.

That is, both buses can depart at the same time in at least another 15 minutes. Grandpa complimented me: "The answer is correct!"

100 points. "Yay! Listening to my grandfather's words, I happily raised my hands.

From this incident, I learned a truth: mathematics is really ubiquitous in real life.

Every year during the Spring Festival, students must receive many ......grandfathers, grandmothers, grandfathers, and grandmothersLet's wait for the New Year's money that the elders give us. Many of our classmates don't know what to do in the face of so much New Year's money: some students use New Year's money to buy and buy that, and they have developed a bad habit of spending money indiscriminately since childhood; Some students left their New Year's money with them and accidentally lost it, which brought a burden to their families; Some students simply deposit the New Year's money in the bank, but it is very inconvenient to ...... when they need to use it.

In fact, I have a wish in my heart for a long time, that is, we will open a "New Year's money bank" in the school to store all the students' New Year's money. In this way, on the one hand, which students who usually use money can be controlled, which can help them get rid of the bad habit of spending money indiscriminately, and at the same time, it is convenient for those students who need to use money; On the other hand, the school can also earn a large amount of interest by depositing the money in the bank. We can use this interest to help students who have dropped out of school because they have no money to study.

If the students can do how much money they have, they can deposit it into the school's "New Year's money bank", and then the school will deposit the students' New Year's money in the bank, and return the principal to everyone when they graduate, and donate the interest to the students whose families are in financial difficulties or the people in the disaster area, then we have done a very meaningful thing.

To be honest, from childhood to now, we have collected more than ten years of New Year's money, at least several thousand yuan, if the average person is deposited in the bank according to 300 yuan per year, each student in the sixth grade can deposit a total of 1,800 yuan. The scale of our school is not large, there are only 17 classes, two classes in the first and second grades, 3 classes in the third, fourth and fifth grades, and 4 classes in the sixth grade, each class is calculated according to 45 students, and the students in 17 classes deposit the New Year's money in the bank for one year, and the annual interest rate is calculated according to the interest rate of the People's Bank of China).

300 RMB).

If the number of classes and the number of students in the school do not change every year, then our school will have a fixed interest income every year. We have several schools in town, and if each of them had a small bank, they would have earned more interest than our school. If every student insists on keeping the New Year's money in the "New Year's money bank", in five or six years, the annual interest income of the whole school will be many times higher.

With this money, on the one hand, we can help children who are out of school because they have no money, and on the other hand, when there is a natural disaster in the country, we can use this money to support children in the disaster area, so that they can have a good learning environment like us (like the snow disaster last year, Sichuan University**).

For the sake of a more prosperous and prosperous country and a harmonious development of society. Students, let's take action quickly, take out your New Year's money, deposit it in the school's "New Year's Money Bank", and dedicate our love! The above is a small wish of mine, hoping that one day it can be realized and make my own contribution to the construction of a harmonious society.

Come up with a topic for yourself.

Mathematics is small**, you can find the subject from life, through an example or research and exploration, highlight the mathematics in life, and use the subject as an argument, which can be calculated in the text!

I'm also very troubled, who can help me, I'm going to pay ...... tomorrow

Now the child is so pitiful in the sixth grade of primary school to write**.

There are many interesting things in the world, and there are many interesting things in our kingdom of mathematics. For example, in my current workbook for Book 9, there is a question that goes like this: "A passenger car travels 45 kilometers per hour from Dongcheng to Xicheng, and after traveling for an hour, it stops, and then it is exactly 18 kilometers away from the midpoint of the east and west cities, how many kilometers are the distance between the east and west cities?"

When Wang Xing and Xiaoying solved the above problem, the calculation method and result were different. The kilometers calculated by Wang Xing were less than those calculated by Xiaoying, but Mr. Xu said that the results of both were correct. Why is that?

Did you come up with it? You can also calculate the results of the two of them. Actually, we can quickly make a way to solve this problem, that is:

45 km), km), km), but if you look closely, you don't feel right. In fact, here we ignore a very important condition, that is, the word "away" in the condition "at this time is just 18 kilometers away from the midpoint of the East and West Cities", does not say that it has not reached the midpoint, or has exceeded the midpoint. If it is less than 18 kilometers from the midpoint, the column formula is the previous one, and if it is more than 18 kilometers from the midpoint, the column formula should be 45 kilometers), kilometers), kilometers).

So the correct answer should be: 45 km), km), km) and 45km), km), km). Two answers, that is to say, Wang Xing's answer plus Xiaoying's answer is comprehensive.

In daily learning, there are often many math questions with multiple answers, which are easy to be ignored in exercises or exams, which requires us to carefully review the questions, awaken life experience, carefully scrutinize, and fully and correctly understand the meaning of the questions. Otherwise, it is easy to ignore the other answers and make the mistake of generalizing.