![](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>)
Three digit divided by one digit division! Please give more points! The more the better!
490÷7= 240÷6= 320÷8= 540÷9=
436÷6= 840÷4= 108÷6= 378÷9=
432÷3= 175÷7= 205÷5= 689÷3=
420÷7= 540÷6= 320÷4= 540÷3=
444÷6= 640÷4= 606÷6= 279÷9=
732÷3= 476÷7= 505÷5= 689÷3=
The sum of a number and its 2 / 3 is 4 / 5. What's the number
4/5÷ （1＋2/3）＝12/25
What number is more than 7 out of 8 and 1 out of 6
7/8+1/6=42/48+8/48=50/48=25/24
It is known that the function FX is an even function defined on (- infinity, infinity). When x belongs to (- infinity, 0), FX = 4 of x-xs
Then, if x belongs to (0, + infinity), FX=
When x0, - x0, f (x) = - x-x ^ 4
English translation
Translation
What color hat do you want·······
Which color of the hat do you want?
How many centimeters is four foot four inch eight
1 foot = 10 inches
1 meter = 3 feet = 30 inches = 100 cm
1 inch = 10 / 3cm
4 feet 4 inches 8 = 44.8 inches = 448 / 3cm ≈ 149.3cm
If the x power of 3 is equal to the fourth power of 9, then x =?
above
The fourth power of nine is equal to the eighth power of three, x = 8
As soon as he saw me
Once he sees me
It is proved that the square difference of any two adjacent odd numbers is a multiple of 8
Let an odd number be 2x + 1 and the other be 2x-1 (x is an integer)
（2x+1)^2-(2x-1)^2
= (4x^2+4x+1)-(4x^2-4x+1)
=8x
It can be seen that the square difference of two adjacent odd numbers is a multiple of 8
How to find the derivative at the piecewise point of piecewise function?
Can we find out the derivative functions on the left and right sides and then find out the limit on the left and right sides?
It's better to use the definition to calculate the left and right derivatives. If the left and right derivatives exist and are all a, then the derivative is a. the advantage of doing so is to avoid mistakes. If you want to use the derivative function of the left and right correspondence rule, you can use the derivative limit theorem: F (x) is continuous in the neighborhood of x0, and it can be derived in the neighborhood of decentralization, LIM (x → x0, f '(x) = a, then f' (x0) = a
RELATED INFORMATIONS
- 1. Junjun paid 45.6 yuan for one kilogram of sugar and three kilogram of biscuits. Congcong paid 21.6 yuan for the same kilogram of sugar and biscuits. How much is each kilogram of sugar and biscuits?
- 2. The formula of "more than less" in grade five
- 3. (1) Three kinds of vegetables, cucumber, kidney bean and Chinese cabbage, are planted in a rectangular field of 45cm in length and 20m in width. The planting area ratio of cucumber, kidney bean and Chinese cabbage is 7:5:8. How many square meters are planted for each of the three crops? (2) the school playground is 100m in length and 60m in width. How many cm should be drawn for each length and width on a drawing scale of 1 / 2000? (3) a kind of soybean can squeeze 5kg oil per 20kg, How many kilos of this kind of soybean is needed to squeeze 90 kilos of oil
- 4. 3 mathematical cylinder and cone application problem formula and answer! (1) The copper cone used by my uncle is a cone with a bottom diameter of 8cm and a height of 9cm. If the copper weight per cubic centimeter is 8.9kg, how many kg is the copper cone? (2) there are eight identical columns in the exhibition hall with a height of 9m and a diameter of 1m. Now we need to paint all the columns. If we use 100g of paint per square meter, how many kg of paint is needed? (3) saw a 10 meter cylindrical wood into four sections, Surface area increased by 24 square decimeters, the original volume of this wood is how many cubic decimeters?
- 5. 2 / 5 of a number is 60. What's 20% of the number\
- 6. A number 60% more than a number is 1 / 5 of 8. Find this number
- 7. There are 24 boys in class 6.2, 20% less than girls. How many girls are there in class 6.2? How many students are there in the whole class? Please explain the parallel formula
- 8. The length of a steel wire is 24 meters. One third of the total length is used for the first time, and 20% of the total length is used for the second time ）How many meters are used in the two times? (2) How many meters are left? (3) How many meters more do you use the first time than the second time?
- 9. Fill in the appropriate conditions according to the formula. The original price of a garment is 120 yuan. What is the current price? （1）（?）：120×85％ （2）（?）：120÷（1＋1/4）
- 10. The original price of a kind of clothing is 120 yuan, but now the price is reduced by 20%. What's the current price
- 11. In the first quarter of a factory, the electricity cost was a yuan, and the water cost was 14 yuan more than twice the electricity cost. In the second quarter, the electricity cost was saved by 15%, and the water cost was 38% more Compared with the first quarter, the second quarter water and electricity cost is overspending or saving
- 12. The electricity cost of a factory in the first quarter is a yuan, and the water cost is 40 yuan more than 2 times of the electricity cost. In the second quarter, the electricity cost is saved by 10%, and the water cost is 38% more. Compared with the first quarter, the water and electricity cost of the factory in the second quarter is overspended or saved? How many yuan is overspended or saved?
- 13. Solving practical problems with equations A shop sells two pieces of clothes. For some reason, the one with lower purchase price loses 10 yuan, and the one with higher purchase price makes at least 20% profit, so that the two pieces of clothes will not lose money. What is the purchase price of the one with higher purchase price?
- 14. The formula of application problem A company selects three people from 152 employees to participate in the year-end friendship competition. Any three of them are required to perform on the stage and choose the best three people combination that can represent the company's image. How many three people groups are there in total? Find the formula!
- 15. The formula of practical problem Calculation formulas related to quadratic equation of one variable Just the formula! Examples are better! do somebody a favour
- 16. Solving practical problems with equations There are two kinds of alcohol with 75% and 45% concentration. To prepare 300 grams of alcohol with 65% alcohol, how many grams should be taken from each of the two kinds of alcohol? What I want is the process of solving the equation, and write out the equivalent relation and reason of the equation!
- 17. Application of equation Some students of a class take part in the community tree planting activities. If there are 7 seedlings, there are 5 lessons left. If each student plants 8 seedlings, there is 1 person who plants one less. How many people take part in the tree planting activities
- 18. (answer with formula and analysis) 1. There are four workshops in a factory. The number of people in the first workshop is one third of the total number of people in the other workshops. The number of people in the second workshop is one fourth of the total number of people in the other workshops. The number of people in the third workshop is one fifth of the total number of people in the other workshops. There are 460 people in the fourth workshop? 2. Grandfather Zhang climbs a mountain every day. It takes 20 minutes to walk every 100 meters up the mountain. It takes 5 minutes to walk every 40 meters down the mountain. Grandfather Zhang always takes a rest in a pavilion one hour after climbing the mountain. He just arrives at the pavilion one hour down the mountain. How many meters does he have to walk every day for exercise?
- 19. Seven out of twenty divided by three out of five, six out of seven divided by 12, five out of sixteen divided by seven out of eight, twelve divided by four out of five
- 20. On the two equations of X, X square-x-2 = 0 and 1 / 2 of X-2 = x + 2 / a have the same solution, then what is a =?