Water is indispensable for human survival, but because human beings don't cherish it, it is sending out strong warnings to human beings again and again.

"Di-di-",this sound is familiar to everyone, like the sound of a clock running, more like the sound of a tap dripping! If a tap drops 9ml 1 minute, 9×60 = 540ml * *, 1 day and night drops 540× 24 = 1 2960 ml, that is, 12.96L, we drink pure water. This is only 1 day. What about a month and a year? One year later, this faucet wasted12.96× 365 = 4730.4L. According to the water volume of 1L, 4.7304T is 4730.4kg, which is an amazing number. Don't forget, in some arid areas, one person can't use so much water 10 years.

Perhaps, in the hot summer peak, as soon as the tap is turned on, you forget to turn it off and let it "splash" all day; Perhaps, you have enjoyed the pleasure of turning on the bathroom faucet to take a bath; Maybe your car is dirty. Connect the hose and flush it at will. ...

I have never experienced the taste of life without water, nor have I felt the preciousness of water.

Don't just think about the future seawater purification, don't cherish the present, where is the "future"?

Cherish water resources, from now on, from bit by bit, from you and me!

Chapter II: Saving Water

There used to be a broken faucet in my house, which kept leaking. Although there are few drops of water, I calculated that a drop of water is 1 g, 360 drops a minute, and 720 minutes a day is 360 grams, which is 259.24 kilograms. If a person drinks 65,438+000 kilograms a day, he can only drink for three days. It's really a small problem that turns into a big accident. If you don't know, this is a shock. If you don't change the faucet, won't the dripping water merge into a long river in the next two, three, four and five years? There are so many people who can't drink clean and hygienic water, and I'm still wasting water. I'm really sorry about the running water. I immediately called my father and changed a faucet, which was no longer leaking.

I once saw such a report on saving water on TV, saying that the waste water after bathing in a person's home was stored in a large reservoir under the bathroom floor tile, and the waste water was used to flush the toilet. I think it saves water. If every household is equipped with this equipment, bath water will not be wasted. Suppose you use 350 kilograms of water for bathing, 0/80 times a year, 63,000 kilograms of water a year, and 900 kilograms of water for flushing the toilet once, so you can flush the toilet 70 times. What an amazing number.

Chapter III: Saving Water

Since the first grade of primary school, teachers have taught us that water is a precious natural resource and we should save water. Today, my mother and I went to a restaurant for dinner. When I washed my hands, I saw the tap running. I am sad. Isn't this a waste of water resources? I hurried to turn off the tap. At this moment, I think: how much water is wasted a year? So, I immediately figured it out in my mind.

The population of China is about 654.38+03 billion. If the water consumption per person per day is calculated as 20 liters, one person uses 20 liters per year ×365 days = 7300 liters.

According to this calculation, China has a population of1300,000,000× 7300 = 949,000,000,000 liters of water a year.

As we all know, washing a car is the most wasteful of water. Dad told me that it takes about 30 liters of water to wash a car. If the car wash shop collects 20 cars a day, then the car wash shop wastes 30 liters ×20 cars a day = 600 liters.

Six car wash shops waste 6×600 liters = 3,600 liters of water a day. A year will waste 365×3600 liters = 13 14000 liters of water, which is exactly the water wasted by six car wash shops in one year. Imagine, how many car wash shops are there in China? How much water is wasted every year?

I did some calculations today to know so much knowledge. Mathematics is really everywhere!

Chapter IV: Saving Water

When I came home from school and saw my mother washing vegetables in the yard, I went over and said, "Mom, will you leave me the water for washing vegetables?" Mother asked strangely, "What do you want with vegetable washing water?" I smiled and said, "You will know later." After my mother washed the vegetables, I took the washing water to the yard and watered a dozen flowers. I thought, "If everyone saves 1 kg of water a day, the whole people can save 1 kg of water a day."

Chapter 5: Don't underestimate a drop of water.

A drop of water is negligible. But it has been dripping, and the number is considerable. It is estimated that Didi can collect 3.6 kilograms of water in 1 hour; 1 month can collect 2.6 tons of water. This amount of water is enough for a person's life. It can be seen that there should be no waste at all. As for the continuous small water flow, it can collect 17 kg per hour and 12 tons per month; Roaring "running water" can collect 670 kilograms of water per hour and 482 tons of water per month. Therefore, water conservation should start from a little bit.

There used to be a broken faucet in my house, which kept leaking. Although there are few drops of water, I calculated that a drop of water is 1 g, 360 drops a minute, and 720 minutes a day is 360 grams, which is 259.24 kilograms. If a person drinks 65,438+000 kilograms a day, he can only drink for three days. It's really a small problem that turns into a big accident. If you don't know, this is a shock. If you don't change the faucet, won't the dripping water merge into a long river in the next two, three, four and five years? There are so many people who can't drink clean and hygienic water, and I'm still wasting water. I'm really sorry about the running water. I immediately called my father and changed a faucet, which was no longer leaking.

There are many ways to save water now. I once saw such a report on saving water on TV, saying that the waste water after bathing in a person's home was stored in a large reservoir under the bathroom floor tile, and the waste water was used to flush the toilet. I think it saves water. If every household is equipped with this equipment, bath water will not be wasted. Suppose you take a bath with 350 kilograms of water, and wash it 180 times a year, and you will use 63,000 kilograms of water a year. If you use 900 kilograms of water to flush the toilet once, you can flush the toilet 70 times. What an amazing number.

Chapter 6: Water and Ice

After learning the knowledge about percentage and cylindrical cone, in order to reflect the connection between mathematics and life, and let students feel that mathematics is everywhere in life, mathematics and life are inseparable, a comprehensive exercise of mathematics "water and ice" is designed.

This comprehensive mathematical exercise of water and ice explores the general law of volume change in the process of water changing into ice and ice changing into water, and further improves students' ability to solve practical problems by comprehensively applying what they have learned.