Five classes play football every two classes

Five classes have football matches between two classes
5 （5-1）2，=5 4 2, =20 2, =10 (field); A: there are 10 competitions in the whole grade. Therefore, B
There are five classes in grade two participating in the football match. Every two class fortresses, how many fortresses are there
This kind of competition is called "single round robin". There are five classes in grade two. A total of C (5, 2) =5 4/2=10 games. The five classes are represented by a, B, C, D and e respectively, so there are the following 10 competitions: AB, AC, ad, AE, BC, BD, be, CD and CEThe school organizes five classes of grade eight to play football. It stipulates that two matches should be played between each class
Each class has eight games. Take class 1 as an example. He has to compete with class 2, class 3, class 4 and class 5. They all have to compete twice, so class 2 4 = 8 fields
Five classes participate in the football match. Every two classes play a game. How many games are there in the fortress
5 （5-1）2 =5 4 2 =20 2 =10 (field)
Five classes in grade three have football matches. Every two classes play a dirt field. So far, class one: Class Two
It can be concluded from the figure that class 5 had 2 matches; A: class five played 2 games; Therefore: 2
Five classes in grade four hold a football match. Every two teams play a game, a total of () games_ Hundred
10 games
There are five classes in grade six who will have a football match. Each class will have a match with other classes. A total of___ Field
There are five classes in total. The first class and the other four classes have one game each, a total of four games. Then the second class and the following three classes each have one game, a total of three games. By analogy, 4+3+2+1 = 10 gamesThere are 26 football teams in the school. They are divided into 5 classes. How many can each class be divided into
This is primary school mathematics. You can get the result with 26 5. Each class can be divided into at least fiveFive classes in grade three should have a football match. It is required that every two classes should have a match. Class III and class 1 are conducted in total
There will be three games. There are n types of methods to complete a thing. In the first type of method, there are M1 different methods, in the second type of method, there are M2 different methods,..., and in the N type of method, there are Mn different methods, so there are n=m1+m2+m3+... +mn different methods to complete the thingThe 15 soccer balls are divided into five classes on average. Each class gets one fifth of these soccer balls. This one represents
I'm glad to answer for you. Divide the 15 soccer balls into five parts, that is, three for each part. One fifth of the one represents one of the five parts, that is, three soccer balls. I hope I can help you