How to express 00003 by scientific counting method

The negative power of 3 * 10

Primary school sixth grade Chinese unit 4 exercises

Proposals
Sinful human beings:
Although the environmental situation of today's highly developed earth looks very optimistic, there are significant hidden dangers. These are all man-made: wantonly cutting down trees, building chemical plants, and indiscriminately discharging harmful liquids. "The world's annual emissions of gases that pose a greater threat to mankind will reach more than 600 million tons." it is estimated that by the middle of the next century, the world's emissions will be more than 600 million tons, One third of the earth's surface is in danger of desertification. Every year, 6 square kilometers of land is in danger of desertification, threatening more than 60 countries. "What do you think of this group of shocking figures? From the emergence of forest ape 23 million to 18 million years ago to the highly developed civilization era, everyone has never stopped asking for it, Nature is "responsive" to all demands, which further fosters human greed
Let's take an example: Mulan River in China was originally a clear river in the early 1950s, but now it is a polluted river where fish and shrimp are extinct, and it also adds a scar to our mother earth. Isn't it a wake-up call to mankind?
Therefore, I solemnly suggest to those who have not yet realized:
First, if human beings want to conquer the terrible nature, they must respect nature. They should be cautious in transforming nature, and be bold in practice and improvement. Only in this way can they control nature and make their own interests develop in harmony with nature. They must not repeat the western developed countries' mistake of "first pollution, then governance"
Second, we should start from me. First, we should choose a way of life that is conducive to protecting the environment. We should treat our home and the earth well, and create a beautiful living environment
1. Save resources and reduce pollution
(1) Take pride in saving water, turn off the tap at any time to prevent dripping
(2) Use detergent with caution and soap as much as possible to reduce water pollution caused by chemicals in detergent
2. Green consumption and environmental protection
(1) Lead free gasoline, cadmium free lead battery and phosphorus free detergent are used to reduce water and air pollution
(2) Buy low - cost household refrigeration appliances and hair - free mousse to reduce ozone layer pollution
3. Reuse and reuse
Try to use less disposable products and more durable products. For example, do not use disposable plastic and lunch box to reduce white pollution; do not use disposable chopsticks; bring your own shopping bag or basket
4. Classified recycling
We should not discard waste batteries, plastics and other wastes, and put them into different categories to turn waste into treasure and recycle resources for the benefit of mankind
5. Protection of nature and coexistence of all things
Do not hunt and use rare animals and protected animals, care and protect wild animals and plants; plant trees and trees, care for every inch of green space, every plant, every tree around us
6. Pay attention to hygiene and protect the environment
No spitting, no littering, no smoking in public places, no making noise
As a new era of primary school students, I advocate students to improve the awareness of environmental protection, and also suggest aunts and uncles to join our team to contribute to the protection of the environment and the benefit of future generations!
Environmental proposal
Mr. director of Environmental Protection Bureau
I am a primary school student in XX primary school
I grew up in XX city since I was a child. I have seen how XX city has changed. From an unknown city to a green city in China, there are folk song festivals, South China Expo
Now in Nanning, words like "everyone is responsible for environmental protection" can be seen everywhere. On the roadside, all kinds of garbage cans are very beautiful. Recently, everyone advocates separating recyclable and non recyclable garbage cans
However, I don't think classification alone is enough. To write down the types of recyclable garbage and non recyclable garbage on the trash can, not everyone accepts as much knowledge as we do. They know what is recyclable and non recyclable garbage. If they think of migrant workers, they will be thrown away, This is not good. It not only does not play the role of environmental protection and waste classification, but also brings trouble to the staff of those garbage sites
In addition, I found a very serious problem
One day, my mother and my grandmother went to the bus together and wanted to go to the martyrs' cemetery. At first, we went out happily, but when we went to the bus station to wait for the bus, we found a garbage can nearby. The garbage in it was smelly, and passers-by walked around with their noses. When we passed by, we would smell a great smell of putrefaction
Later, when I went to places where there were garbage cans, I carefully observed whether there was a bad smell. After a period of observation, I found that the garbage cans are fixed now, which is not the same as before. But why do they stink? Later, I learned that the reason is that the garbage cans are fixed. When the sanitation workers clear the garbage cans in the morning, Once, I asked them why they didn't clean up the garbage. They said that they didn't want to, because the garbage can is fixed, so they can't reach the bottom, and the garbage can't be poured out, so they can only leave the garbage inside
It can be seen that the garbage can stinks not because the sanitation workers are not responsible, but because there is something wrong with the design of the garbage can. I hope that for the beauty of XX city and the freshness of the air, uncle mayor will ask someone to design some practical and good-looking garbage cans again, so as not to let those stinks pollute our fresh air

As shown in the figure, in rectangular ABCD, ab = 12cm, BC = 6cm, points E and F are on AB and CD respectively. Fold rectangular ABCD along EF so that points a 'and d' fall on points a 'and d' on the outside of rectangular ABCD respectively, then the perimeter of the whole shadow part figure is ()
A. 18cmB. 36cmC. 40cmD. 72cm

Extend a1e and intersect CD at point g. from the meaning of the title, Ge = eh, FH = GF, ehd1a1 ≌ EGDA, ad = a1d1, AE = a1e, DG = d1h, FH = FG, the perimeter of the shadow part = the perimeter of the rectangle = (12 + 6) × 2 = 36cm

On the blackboard are written 1,2,3,..., 99100, totally 100 numbers, 2 numbers to be erased at any time What is this number?
On the blackboard are written 1,2,3,..., 99100, totally 100 numbers. Each time you erase 2 numbers at will, and then write the sum of these 2 numbers minus 1. After several times, there is only one number left on the blackboard. What is this number?

In fact, it is to calculate how many times it has been wiped, one less number at a time, a total of 100 numbers, 99 times it has been wiped, only one left, and then once it has been wiped, it is the sum of 1 ~ 100, 5050, reduced by 1, so long it is 5050-99 = 4951, Wahaha, I don't know right!

A lime plant uses local resource limestone (the impurities do not decompose at high temperature and do not react with acid) to produce lime by calcining at high temperature in a lime kiln. 5.92g of calcined sample is completely reacted with 25.0ml hydrochloric acid and 44.8ml of carbon dioxide is released (standard condition). 0.12g of residual residue is filtered out
(1) Conversion degree of calcium carbonate in limestone (expressed in%);
(2) Concentration of hydrochloric acid

After calcination, calcium carbonate, calcium oxide and impurities are obtained. If the impurity is 0.12g, then calcium carbonate and calcium oxide are 5.92-0.12 = 5.8G. 44.8ml carbon dioxide is released, that is, 0.002mol. According to the conservation of carbon element, calcium carbonate is 0.002mol, that is, 0.002 * 100 = 0.2g. Then calcium oxide is 5.6g, that is, 0.1mol

A triangle and a parallelogram have the same base and height. The ratio of the area of the triangle and parallelogram is?

Area of triangle = (bottom * height) / 2
Area of parallelogram = base * height
So the ratio of the area of triangle and parallelogram is 0.5

1. 6, 11, 13 count as 24
Don't use the formula (13 * 11 + 1) / 6
(6,1)*11+13=24 (6,1)?

1^6*11+13
1 ^ 6 is the sixth power of 1

Forty two calculation questions in fifth grade volume I (Beijing Normal University Edition)

You're in primary school. I'm also in Grade 5. I'm also learning from Beijing Normal University. Is it really small?
Is it?
ha-ha
I'm just surprised,
Nothing to ask, hehe
Please answer me

As shown in the figure below, in ladder ABCD, AD / / BC, diagonal lines AC and BD intersect at point O, and straight line EF parallel to BC passes through point O, intersecting AB and CD at e and f respectively
(1) Verification: OE = of;
(2) If the line parallel to BC is no more than point O, but intersects two waists, try to find out whether there is a corresponding conclusion

Certification:
∵EO‖AD
∴OE/AD=BE/BA
∵OF‖AD
∴OF/AD=CF/CD
∵AD‖EF‖BC
∴BE/BA=CF/CD
∴OE/AD=OF/AD
∴OE=OF
(2) Let EF intersect BD at point m and AC at point n
The similar conclusion is: EM = FN

On the quadratic equation MX2 - (1-m) x + M = 0 with one variable of X, there are real roots, so we can find the value range of M

Since the quadratic equation MX2 - (1-m) x + M = 0 has real roots, its discriminant △ = (1-m) 2-4m · m ≥ 0 is obtained, and - 1 ≤ m ≤ 13 is obtained, so the range of M is [- 1, 13]

How to express 00003 by scientific counting method