866 120 divided by 27.2%=3 184265 square kilometers.
You can convert my Chinese characters into mathematical symbols.
Original price 150 price 150X0.8= 120.
150- 120=30, right.
Because the volume hasn't changed, the first one is C.
Because when two cubes are spliced into a cuboid, the surface area at the splicing place is gone, so the second one is B.
75%X= 120 It is urgent to solve the equation 75%X= 120.
3x/4= 120
3x=480
x= 160
X-60%=240
x-0.6=240
x=240.6
Quarter 5X-X=3.6
1.25x-x=3.6
0.25 times =3.6
x=360/25
x= 14.4
125%X+50%X=280
5x/4+x/2=280 (universal score)
5x+2x= 1 120
7x= 1 120
x= 160
50%X=300
x/2=300
x=600
50%X- 15%X=2 10
0.5x-0. 15x=2 10
0.35x=2 10
x=2 1000/35
x=600
In order to solve this problem, a conical beach covers an area of 25 square meters and is 2.4 meters high, and the weight of sand per cubic meter is 1.7 tons. How many tons is this pile of sand?
1.7×(25×2.4× 1/3)
= 1.7×20
=34 tons
Fourth, ask for help urgently. March 5th is the activity day to learn from Lei Feng. On this day, many units and individuals are learning from Lei Feng to do good deeds, and their activities are very prosperous. However, after March, fewer people learned from Lei Feng, which shows that many people learn from Lei Feng only in a formal way, and do not insist on doing good deeds.
How long was it urgent for ophthalmologists to enter randomly? It should be the fatigue of the eyes, and the adjustment ability of the eyes has declined. It should be nothing serious.
According to the information provided by the landlord, I guess there may be vitreous opacity. In addition, the landlord should pay attention to his health. Many times it is not an eye problem, but a reminder that there are hidden dangers in his health. It is suggested that the landlord go to the hospital for examination. In addition, eat more food that is good for his eyes, such as carrots, and take more vitamin A. Good luck!
I feel really good. In a blink of an eye, I 1 1 years old. In this 1 1 year, I experienced many things, some made me sad, some made me happy, but what impressed me most was the joy after that success.
That was when I was nine years old. When I came home from school, I saw many big brothers and sisters skating on the roadside. Their skating skills are very good. They slide back and forth from time to time and change their patterns from time to time, which dazzles me. I envy them very much and decided to study. As soon as I got home, I asked my parents to buy me roller skates. My parents reluctantly shook their heads and agreed. I am very happy.
The next morning, I climbed out of bed because my father promised to buy me roller skates today. I have looked everywhere, but I can't find my father. I asked my mother where my father had gone. My mother said that he gave us roller skates early in the morning and asked me to wait for him while doing my homework. So, I took out my exercise book. Although I am writing homework on the surface, my mind is full of roller skating, so this homework is poorly written. Soon, I finished all my homework. I sat on the sofa, waiting for my father's triumphant return. Half an hour later, my father finally came back, and I was even happier than seeing God. I jumped up from the sofa and greeted my father with roller skates.
I picked up my roller skates and ran to the garden behind my house. I slipped on roller skates. Well, this is a good skates, I said to myself. I was so proud that I closed my eyes and started skating. When I opened my eyes, ah! There was a big stone in front of me, and I hit it before I could turn around and fell to the ground with a splash. At this moment, a big brother glided by and said to me in a sarcastic tone, "Hey, little sister, you learned to wrestle before you learned to skate. It's amazing! " Hearing this, I suddenly felt ashamed. I really want to find a crack in the ground. I rubbed my aching fingers and walked home, thinking: Hey, that damn invented this sport! I fell to my death.
When I got home, I threw my roller skates on the ground and sat on the sofa in a daze. After a while, my father saw it and asked me what was going on. I didn't speak, just looked at my father awkwardly. My father seems to know everything, and he said to me earnestly, "Son, my father once told you a famous saying,' How can you see a rainbow without experiencing wind and rain? No one can succeed casually', you should know that' failure is the mother of success'! "I listen, lost confidence was picked up again. I jumped up from the sofa and said to my father, "I know, dad." So I picked up roller skates again and ran towards the garden.
I put on my shoes and began to practice roller skating. I fell and got up again, once, twice, three times ... It was a lot of trouble, and I finally learned to skate! At that time, I felt that flowers were smiling at me, white clouds were waving to me, and the sun gave me a thumbs-up sign. ...
Ah! It feels good to be successful!
How to write these two questions urgently! four
52÷ 13=4 floors
on one's pins
7-4 = 3rd floor
five
60÷2- 1=29
long
10x29=290 meters
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