![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
LAN LAN and Tian Tian fold a thousand paper cranes together. Lan Lan says to Tian Tian, "you fold 1 / 5 less than me." Tian Tian says to LAN LAN, "if you give me your 1 / 6, I'll have four more than you." please calculate how many thousand paper cranes LAN LAN has folded?
Let Lan Lan fold x paper cranes, then Tian Tian fold 4x / 5
4x/5+x/6=x-x/6+4
29x/30=5x/6+4
29x=25x+120
X = 30
A: LAN LAN folded 30 thousand paper cranes
LAN LAN and Tian Tian fold paper cranes together. Lan Lan says to Tian Tian, "you fold 25% less than me." Tian Tian says to LAN LAN, "if you fold 20% for me, I'll have 3 more than you." please calculate how many paper cranes Lan Lan has folded?
Let Lan Lan fold x paper cranes. The meaning of the title is: x-20% x + 3 = (1-25%) x + 20% x, & nbsp; 0.8x + 3 = 0.75x + 0.2x, & nbsp; 0.8x + 3 = 0.95x, & nbsp; & nbsp; 0.15x = 3, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 20; a: Lan Lan Lan folds 20 paper cranes
Beibei and Lili took out the same amount of money to buy breakfast together. As a result, three eighths of Beibei's money and four ninths of Lili's money were left,
Who brought more money in the beginning
Beibei
Beibei and Lili plan to fold 150 little stars for Miss Wang. Beibei has folded one third of all the stars, and Lili has folded two fifths of all the stars,
In a row
1.150 × 1 / 3 A. how many are left?
2.150 × (1 / 3 + 2 / 5) B. how much is Beibei folded?
3.150 × (1-1 / 3-2 / 5) C. how much discount have Beibei and Lili got?
4.150 × (2 / 5-1 / 3) d. how much more did Lili discount than Beibei?
1—— （ ） 2——（ ） 3——（ ） 4——（ ）
1——（B ） 2——（C ） 3——（A ） 4——（D）
A letter to children in Wenchuan earthquake stricken area
We should ask them about their current situation and comfort the orphans who have lost their relatives
Write a letter to the children in the earthquake stricken area
A letter to children in disaster area
Dear children in the disaster area
How are you?
I am a sister who worries about you in the distance. After the "5.12" earthquake, I am very worried about you. Even if the house falls to the ground and your family is buried in the soil, your home is suddenly in ruins. You are scarred and displaced. I feel your pain in the distance. Looking at your crying face on the screen, I have mixed feelings, sadness and sympathy, Hate? Friends, don't cry! Wipe the dust off your shoulders, wipe the tears from the corner of your eyes, smile, your relatives are in heaven, wish you bravely face life, live happily, you can't live up to your relatives!
You have lost your relatives, but we will all be your relatives. We are the descendants of the dragon, and we also have the character of indomitable plum blossom of the people's Republic of China. The motherland is your home, and the Chinese people are your relatives. Beside you are the great people. You have a great motherland behind your back! We love you forever! The children there survived the 7.6 earthquake in Tangshan, Why can't you? Stand up, let's race against time. We lift our arms to become the Great Wall. Our hearts are connected to form an iron wall. What's the use? Crying, your dead relatives won't come back, and your lost family won't come back. What we should face, we will never escape; what we should persevere in, We will never give up; we will never miss what we should give up; we will grasp what we should cherish
Heaven and earth are merciless, and there is love in the world. I bless you, pray, we celebrate the children's day together, our hearts are together.
wish
good health!
People praying for you: so and so
Year, month and year
Beibei and Lili both donated money to the people who suffered from the snow disaster in the south. Beibei donated 18 yuan less than Lili, and Lili donated three times as much as Beibei. Ask them what they each donated
Shebei donated X Yuan and Lili donated y yuan
3x=y
x+18=y
x+18=3x
x=9
Substituting x = 9 into the original
y=27
Beibei donated 9 yuan and Lili donated 27 yuan
The money donated by Beibei is regarded as unit 1. Lili's is 3 (three times of unit 1)
(3 - 1) Lili donated more money than Belle, just 18 yuan
So Beibei's donation is (3 - 1). (maybe you can't understand) Lili's donation is (3 - 1 = 2) as a unit value
So 18 / (3 - 1) = 9 yuan, Beibei donated 9 + 18 = 27 Lijuan's money
Let Lili be x and Beibei be (18-x)
The equation is x = 3 (x-18)
X=3X-54
X-3X=-54
-2X=-54
X=27
Because Lili is 27, x = 27 is brought into the set value
（18-X）=9
What is the pattern formed by the minute hand of a clock rotating for one cycle______ ．
The figure formed by the minute hand of a clock is a circle
The graph formed by the minute hand of the clock rotating one circle is (). The line segment from () to () is called radius. The line segment passing through () and () is called diameter
Fill in the blanks
The figure formed when the minute hand of a clock rotates for one circle is (circle). The line segment from (Center) to any point on (circle) is called radius. The line segment passing through (Center) and (both ends) on (circle) is called diameter
What is the figure formed when the minute hand of the clock rotates for one circle
Round
RELATED INFORMATIONS
- 1. (1) The figure formed by the minute hand of the clock rotating one circle is () (2) the line segment from () to () is called radius (3) The line segment that passes through () and () is called diameter (4). In the same circle, all radii () are equal, and () whose diameter is equal to radius is also equal. (5) use a compass to draw a circle with a diameter of 20cm, and the distance between the two feet of the compass is () cm. (6) a circle is a () figure, which has () axis of symmetry. (7) a square has () axis of symmetry, and a rectangle has () axis of symmetry（ ）(8) the circumference of a circle is () times of the diameter of the same circle. (9) the radius of a circular fish pond is 10 meters. If you walk around it once, you have to walk () meters. (10) the length of the hour hand of a wall clock is 5 cm, (11) when drawing a circle, the distance between the two feet of the compass is the circle () (12) the line segment with both ends on the circle, () is the longest. (13) the ratio of the radius to the diameter of the circle is () (14) the radius of the small circle is 6cm, the radius of the big circle is 9cm. The ratio of the diameter of the small circle to the diameter of the big circle is (), (15) the radius of the circle is 7 cm, its circumference is () cm, the diameter of the circle is 13 m, its circumference is () M. the circumference of the circle is 75.36 decimeters, its radius is () decimeters. (16) a wire hoop should be put on the outside of the cylindrical bucket with a bottom half diameter of 14 cm, and the joint part is 6 cm, Use wire () cm (17) to draw a circle with a compass. If the distance between the two feet of the compass is 6cm, the circumference of the circle drawn is () cm. (18) when drawing a circle, the fixed point is () cm. (19) the radius from the center of the circle to any point on the circle is () cm. (20) the circumference is () cm. (21) the diameter and length of the circle determine () cm
- 2. Xiao Ming's family hung up a clock and struck it twice an hour: at what time and in half an hour. Think about it, how many times does this clock strike in a day and a night?
- 3. If the clock strikes at every hour, the number of times it strikes is equal to the number of the clock points, and it strikes at every half hour, then the clock strikes day and night______ Next
- 4. The length of the hour hand of a clock is 14 cm. After a day and a night, how many cm is the distance that the point of the hour hand passes
- 5. When is the first time that the hour hand and the minute hand coincide?
- 6. The conclusion of the experiment of measuring the acceleration of the car with the clock
- 7. A question about using the successive difference method to calculate acceleration Can I use a = (x6 + X4 + x2-x5-x3-x1) / 3t2 to calculate the acceleration? Can I use all the data?
- 8. For a two digit number, its ten digit number plus seven times of the one digit number is still equal to the two digit number. Such a two digit number has () A. One B. two C. three D. four
- 9. Xiao Ming's wall clock is slow every hour. At 8 a.m., Xiao Ming sets the clock at the standard time. At 12 noon, what's the standard time?
- 10. Xiao Ming and his father go to the park to play. Xiao Ming wants to make a plane. Today is children's day. Xiao Ming has half a ticket. His father paid 20 yuan in total and recovered 2 yuan. How much is the ticket price for Xiao Ming and his father
- 11. The charging standard of a local telephone is: 30 cents for the first five minutes, and 20 cents for every minute after that. Uncle Wang pays 2 yuan and 70 cents after a call, and he calls for () minutes at most?
- 12. This year, the age of father and daughter is 52 years old. Six years later, the age of father is three times that of daughter. What are the ages of father and daughter?
- 13. There are three people in the family. My father is three years older than my mother. Now the total age of the family is 80 years old. Ten years ago, the total age of the whole family was 51 years old. My daughter is now 80 years old______ I'm 40 years old
- 14. I want to ask some math questions Find the rules and fill in the numbers: 0, 3, 8, (), (), 35
- 15. Yesterday afternoon, Mr. Zhang assigned a math problem. In the evening, I racked my brains and couldn't figure out how to solve it, Fill in a poem My grandfather's 70th birthday is congratulated by all my relatives and friends. I wish my grandfather happiness and longevity. But my grandfather sighed () I'll stop him soon () grandfather, your body is stronger than young people!
- 16. If there are two ways to charge mobile phone: the first way, the user's monthly phone fee: 10 yuan monthly rent plus 0.4 call fee per minute; The second way, the user's monthly fee: 25 yuan per month plus 0.2 yuan per minute 1. How long is the call time per month, and how much is the call cost of the two modes? Due to business needs, boss Zhang calls no less than 3 hours a month. Please help him figure out which one is cost-effective
- 17. The following table shows the time difference between several cities and Beijing (the number with a plus sign indicates the time earlier than Beijing time at the same time) paris-7 Tokyo + 1 new york-14 If Beijing time is 8 p.m., what's Paris time? If it's 8:00 p.m. Beijing time and Xiao Ming is calling his friends in New York, do you think it's appropriate? There should be a formula
- 18. The charge standard of a taxi company is 6 yuan within a kilometer, and 1.2 yuan per kilometer for the part more than 3 kilometers (1 kilometer for less than 1 kilometer). Xiao Zhang has to go to a place 6.5 kilometers away, and he should pay if he rents the car of a company_____ element Company B doesn't charge the starting price. It should be paid outside 6.5________ element If he goes 9.6 kilometers away, should he choose car a or B?
- 19. The charging standard of a city's taxi country is that the starting price of 3 km (including 3 km) is 5 yuan, and 2.4 yuan is added for every kilometer beyond 3 km. A passenger takes this taxi for X km. The formula of X is used to express the passenger's payment
- 20. The taxi pricing rules in a city are as follows: for a journey of less than 3km, the starting price is 8 yuan, and for more than 1.2 yuan per kilometer. One day, Mr. Li and three classmates went to the taxi A taxi paid 17.6 yuan to visit a student. How many trips did they take I'm sorry, but I don't have any