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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?
(2.7-0.3) / 0.2 = 2.4 / 0.2 = 12 minutes
12 + 5 = 17 minutes
15. A communication company carries out two kinds of services: "global" users pay 30 yuan monthly rent, and then pay 0.20 yuan per minute of the call, "Shenzhouxing" does not pay the monthly rent, and pay 0.3 yuan per minute of the call, if the call is X minutes in a month
30+0.20*x=0.3*x
Then x = 300
When x is larger than 300, choose the first one
When x is less than 300, select the second one
When x = 300, both are OK
Lili, Beibei and Tiantian collected 420 batteries
Among them, Tiantian collected 1 / 3 less batteries than Beibei, and Beibei and Lili collected 4:5 batteries. Do you know how many batteries each of the three children collected?
Beibei x Festival, Tiantian x-x / 3, Lili 5x / 4
x+x-x/3+5x/4=420
24x-4x+15x=420*12
35x=420*12
x=144
So Beibei 144, Tiantian 96, Lili 180
What is the meaning of 32 thousand paper cranes?
You are the only one for me
02 love each other
03 I love you
04 oath and promise
05 no regrets
06 smooth
07 happy meeting
08 make up
09 keep your face and be firm
Perfect, perfect you
Love and dedication
Heart to heart, perfection
Secret love
Good gathering and good scattering
You are my other half
The two of them are in love with each other
21 Favorite
22 pairs
Missing all the time
I love you three lives, from the past life, this life to the afterlife
My heart belongs to you
44 to death
Love without regret
Love without regrets
56 my love
I love my wife
Everything goes smoothly and smoothly
It's fate to meet each other
88. I'm sorry
99 stay together and be firm
100 years old
You are the only one for me
Marry me
144 love you forever
I miss you every day
999 everything you want
1001 forever
Love you all your life
Beibei and Lili practice writing brush words. From the beginning to now, Beibei has written 120, 96 more than Lili. From today on, they changed their plan. Beibei insists on writing 13 every day, Lili insists on writing 25 every day. How many days later, Lili's total number of brush words is 96 more than that of Beibei
96÷(25-13)
=96÷12
=8 (days)
Beibei and Lili write calligraphy. From the beginning to now, Beibei writes 96 more than Lili. Today, they change their plan. Beibei writes 13 every day and Lili writes 25 every day. How many days later, Lili's total number is 96 more than that of Beibei
Let's say X days, because from the beginning of beibeiduo to later liliduo, there was a total difference of 198, and later liliduo had 12 more than Beibei every day, so we can divide 198 by 12, 16
Lili plans to write 15 brush words every day, but actually writes 5 more every day. As a result, she completes the task 2 days ahead of schedule. How many brush words does Lili have to write?
(15 + 5) × (15 × 2 △ 5), = 20 × 6, = 120 (pieces); answer: Lili has to write 120 calligraphy characters
Beibei and Lili practice writing brush words. From the beginning to now, Beibei has written 120, 96 more than Lili. From today on, they change their plan, and Beibei is the best
After X days, the total number of calligraphy characters written by Lili will be 96 more than that of Beibei
120-96+25x=120+13x+96
The solution is x = 16
A: after 16 days, Lili will write 96 more Chinese characters than Beibei
Lingling and Lily practice writing brush words. From the beginning to now, Lingling has written 120, 96 more than Lily
From today on, they changed their plan. Lingling kept on writing 13 characters a day, and Lily kept on writing 25 characters a day. How many days later will Lily write 96 more calligraphy characters than Lingling?
Lily writes 25 words every day and Lingling writes 13 words every day. Relatively speaking, Lingling doesn't write every day. Lily writes 12 words every day. If lily wants to catch up with Lingling and surpass her 96 words, it is equivalent to the number of words lily has to write: 96 (less written before) + 96 (more written after) = 192, so the speed of each day is 12 words, 192 / 12 = 16 days
Beibei and Tiantian plan to fold 60 paper cranes. Beibei has finished 3 / 5 of the plan and Tiantian has folded 45. What percentage of the plan have they actually finished?
(1) 60 × 3 / 5 = 36
(2) 36 + 45 = 81
(3) 81 △ 60 = 1 and 7 / 20
Therefore, the two actually completed 1 and 7 / 20 of the plan
RELATED INFORMATIONS
- 1. 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?
- 2. (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
- 3. 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?
- 4. 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
- 5. 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
- 6. When is the first time that the hour hand and the minute hand coincide?
- 7. The conclusion of the experiment of measuring the acceleration of the car with the clock
- 8. 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?
- 9. 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
- 10. 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?
- 11. 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?
- 12. 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
- 13. I want to ask some math questions Find the rules and fill in the numbers: 0, 3, 8, (), (), 35
- 14. 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!
- 15. 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
- 16. 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
- 17. 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?
- 18. 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
- 19. 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
- 20. The pricing rules of a taxi in a city are as follows: the journey does not exceed 3 kilometers, the starting price is 8 yuan; the extra part charges 1.2 yuan per kilometer, and a passenger gets out of the hotel Rent a car to the railway station and pay 17.6 yuan. How many kilometers is the distance from his hotel to the railway station