There are upper, middle and lower layers on the bookshelf. A total of 192 books have been put on the bookshelf. First, take out as many books from the upper layer as the middle layer and put them on the middle layer. Then take out as many books from the middle layer as the lower layer and put them on the lower layer. Finally, take out as many books from the lower layer as the upper layer and put them on the upper layer. At this time, the books on the three layers are just the same?

There are upper, middle and lower layers on the bookshelf. A total of 192 books have been put on the bookshelf. First, take out as many books from the upper layer as the middle layer and put them on the middle layer. Then take out as many books from the middle layer as the lower layer and put them on the lower layer. Finally, take out as many books from the lower layer as the upper layer and put them on the upper layer. At this time, the books on the three layers are just the same?

Finally, the upper, middle and lower levels each have 192 △ 3 = 64 (copies). Finally, take out as many books left from the lower level as those left from the upper level and put them on the upper level. This is the same number of books on the three levels. It shows that the lower level gives the upper level 64 △ 2 = 32 (copies); the lower level does not give the upper level 64 + 32 = 96 (copies); the lower level has 96 △ 2 = 48 (copies); the middle level does not give the lower level 192-32-48 = 112 (copies); the middle level has: Answer: there are 88, 56 and 48 books on the upper, middle and lower shelves

More than 2000 books have been added to the school library
It's urgent to revise the wrong sentence!

Nearly 2000 new books or books have been added to the school library
More than 2000 books have been added to the school library

In the romance of the Three Kingdoms, a famous classic of Chinese literature, a hero is portrayed as crossing five passes, cutting six generals and riding alone for thousands of miles_______ There are many stories about this hero in this book. Please write the name of the story in the simplest language:_________ .
Please, I have an urgent need

Guan Yu
Guan Yu cuts Huaxiong with warm wine

In {an}, if q = 2, s99 = 77, then A3 + A6 + +a99=______ ．

Because {an} is an equal ratio sequence with a common ratio of 2, let A3 + A6 + A9 + +A99 = x, then a1 + A4 + A7 + +a97=x4，a2+a5+a6+… +a98=x2．S99=77=（a1+a4+a7+… +a97）+（a2+a5+a6+… +a98）+（a3+a6+a9+… +a99）=x+x2+x4=74x，∴a3+a6+a9+… A99 = 44, so the answer is: 44

3.04 liter = () cubic decimeter () cubic centimeter 0.5 hectare = () square meter
3. The youth travel agency launched a special offer on New Year's day. The original price of Huangshan tour is 2800 yuan. Now it's 15% off. How much cheaper is it than the original price?

3.04 liter = (3) cubic decimeter (40) cubic centimeter 0.5 hectare = (5000) square meter
2800 × (1-0.85) = 420 yuan cheaper

A convoy transported a batch of disaster relief materials. It was originally planned to travel 40 kilometers per hour and arrived at the disaster area in 7.5 hours. In fact, it traveled 50 kilometers per hour. According to this calculation, how many kilometers does it take to complete the journey

50X=40x7.5
X = 6 hours

How many tons is a cubic meter of sand

It is determined by the bulk density of sand. Generally, the bulk density of construction sand is 1350-1450kg / m3, so the weight of one cubic meter of sand is about 1.35-1.45t

2.4-（ x-4）/2.5=3/5x
(2x+1)/3-(x-5)=3/2

2.4-（ x-4）/2.5=3/5x
2.4＝（ x-4）/2.5＋3/5x
2.4＝（ x-4）/2.5＋0.6x
2.4＝ x/2.5-4/2.5＋0.6x
2.4＝ x/2.5-4/2.5＋0.6x
2.4-4/2.5= x/2.5＋0.6x
2.4-1.6= 0.4x＋0.6x
x=0.8

The volume of a cylinder is 125.6 cubic centimeters, and the diameter of its bottom is 4 centimeters. How many square centimeters is its side area?
2. Cut a cube block with an edge length of 6 decimeters into the largest cylinder. How many cubic decimeters is the volume of the cylinder?

1. Bottom area = 3.14 * (4 / 2) & 178; = 12.56 square centimeter;
Height = 125.6 / 12.56 = 10 cm;
Side area = 3.14 * 4 * 10 = 125.6 square centimeter
2. Height = diameter = 6 decimeters;
Volume = 6 * 3.14 * (6 / 2) & 178; = 3.14 * 6 * 9 = 169.56 cm3

10 1 10 7 10 8 10 6 10 7 10 7 10 9 10 Lo 10 28 =?

84