1 My home is about 3500m away from Guanqian Street. It takes us about 30 minutes to travel by car on weekends, that is to say, we drive about 120 meters per minute on average. In addition, you need to add the time to find a parking space and pay the parking fee. But once my grandmother took me to ride a battery car, which only took 20 minutes. In other words, I rode about 175 meters per minute on average. In contrast, the speed of cycling is 1 of the driving speed. About five times. So, I said to my mother, "If we travel by bike, we can not only save time, but also save parking fees and gas bills." My mother smiled and praised me for being thoughtful.
This unintentional calculation made me understand why we should advocate green travel! Really save time and money.
Mathematics is everywhere in life. As long as you use your head, you will find many ways to save time and money. I like math, so I must study hard and apply what I have learned to real life.
Today, my aunt gave me a math problem, which is about age. Don't just look at one question, it's an Olympic math problem, and I have to use my brain. The topic is; The daughter is 3 years old and the mother is 33 years old. A few years later, my mother is seven times as old as my daughter.
I thought about it and said; Their age difference should be worked out first; 33-3 = 30 (years old) Their age difference will never change. A few years later, my mother was three times as old as my daughter. Think of the daughter's age as one and the mother's age as seven. You can draw a line drawing to do it. That is, the difference is 6 copies, that is,' 7- 1 = 6 (copies), and 6 copies are 30 years old, so after a few years, the daughter's age is 30 divided by 6 = 5 (years old), that is; After 5-3 = 2 (years), the mother's age is seven times that of her daughter.
Aunt, listen, give me an admiring look from time to time!
On Sunday, I went to my neighbor's house next door. As it happens, he is worried about an Olympic math problem. I looked at the paper in his hand: Xiao Ming has 1 yuan, RMB from 2 yuan and 5 yuan, with a total face value of 200 yuan. It is known that 1 yuan is 4 RMB more than that of 2 yuan. How much RMB are there in these three denominations?
He said that he would take me out to play as long as I could work out this problem. When I looked at this question, I thought of the new knowledge I learned this semester: replacement, and I readily agreed.
Let's assume that 1 yuan minus 4 yuan RMB, then the total * * of these three RMB is 60-4=56 yuan RMB, and the total face value is 200-4= 196 yuan RMB, so the figures of 1 yuan RMB and 2 yuan RMB become the same. Assuming that all the 56 RMB notes are from 5 yuan, the total face value of these RMB notes is 5x56=280 yuan, which is 280- 196=84 yuan more than the previous assumption.
This is because 1 yuan and 2 yuan are assumed to belong to 5 yuan, so 5x2- 1-2=7 yuan, 84÷7= 12, from which we can see that 12, 1 yuan and1.
I checked it carefully after I finished, and the answer was correct. I told him my calculation process at once. He praised my ability to solve problems, and my heart was sweeter than eating honey. We went out happily together.
I think it is the greatest happiness to discover mathematics in life, understand and use it and share it with friends!
Students, I have a topic here. You should try it, too!
A car traveled for 3 hours in the morning, 2 hours in the afternoon and 340 kilometers in the afternoon. If you drive 5 kilometers per hour in the morning than in the afternoon, how many kilometers per hour in the morning? What about the afternoon?
One day, when I was playing a game, I met a challenge. As long as the topic is done correctly, I will get the corresponding reward. The topic is as follows: from 1+2+3+ ... 100 =? I don't know when to add this. I quickly asked my father, who taught me a good way: for example, if you add 1 to 6, you can form 1+6 = 7, 2+5 = 7, 3+4 = 7, plus three 7s or 3x7, the number is 2 1. The calculation method is that the first number 1 and the last number 6 are added to get 7, and then multiplied by half of the last number, that is, multiplied by 6 ÷ 2 = 3, 3× 7 = 2 1, which is much more convenient. I tried to calculate that from 1 to 10, it is1+10 =1,10 ÷ 2 = 5,/kloc-0. Then 1 plus 100 is1+100 =10/0/,100 ÷ 2 = 50,10.
Haha, addition becomes multiplication, fast and accurate. Mathematics is really wonderful, and there is no end to mathematics. Mathematics is really a happy paradise!
Mathematics thesis composition 5 In life, there is mathematics everywhere. As long as you are good at observing, you will certainly find the infinite mystery it contains.
I like math very much, and I like exploring at ordinary times. Mathematics is a part of my life and my only hobby. My dream is to be a mathematician, a great mathematician.
In the fourth grade, Mr. Zhou, a math teacher, taught us the Law of Constant Quotient. As a beginner, I am curious and some don't believe it.
The law of quotient invariance is that in division, the dividend and divisor are expanded or reduced several times at the same time, and the quotient will not change, but the remainder will change.
I started an experiment around this rule. I tried two numbers, 40 and 6. 40 divided by 6 equals 6, and the remainder is 4. I expand 40 and 6 at the same time/kloc-the same multiple of 0/00 becomes 4000 divided by 600. I calculated that the quotient is 6 and the remainder is 400. Its quotient has not changed, and the remainder has been expanded to the same multiple of 100, which becomes 400. I was taken aback. The quotient really hasn't changed. It's still 6, but the remainder has changed.
I still don't believe it. I tried again with 50 and 4. 50 divided by 4 equals 12, and the quotient is 2. This time, I expand 50 and 4 to twice the original number at the same time, and it becomes 100 and 8 100 divided by 8, and the quotient is 12, and the remainder is 4. The quotient has not changed, but the remainder has been enlarged by 2 times to become 4. I was completely shocked and once again realized the magic of mathematics.
When I was in the fifth grade, I came into contact with equations, which are actually equations with unknowns. After studying the invariant law of quotient, I became interested in this equation again. I found a lot of equations to do and learned to find the law from them.
3x？ 2=302 is calculated by subtracting 2 from 302 to become 3x=302-2, then 3x=300, and then dividing 300 by 3 to become x=300÷3, and the result becomes x= 100. I didn't expect to solve this equation in just a few steps and get the answer.
I found another equation to calculate. 5x-6÷3=38, first 6÷3 to 5x-2=38, then 38? 2 equals 40, and the formula becomes 5x=40. Finally, 40 divided by 5 equals 8, and the result is x=8.
Mathematics is like a mountain peak, soaring into the sky. I felt relaxed at first, but the higher I climbed, the steeper the peak became, which made people feel scared. At this time, only those who really love mathematics will have the courage to continue climbing. Therefore, people who stand at the peak of mathematics all like mathematics from the heart. People who stand at the foot of the peak will never see the peak. Only by discovering and feeling mathematics in life can we broaden our horizons!
Let's explore the mystery of mathematics together!