It is difficult to know when it started, but it is gradually accepted by more and more people with its unique mathematical charm and rich connotation. This game is easy to learn and is a very beneficial activity.
The game content of "Counting 24 Points" is as follows: take 52 cards from a deck (40 cards of 1 ~ 10 can also be used for initial training) and randomly draw 4 cards (called deck cards). Add, subtract, multiply and divide (brackets can be added) to calculate the number on the deck as 24. You need to use every card.
As a poker intelligence game, we should also pay attention to skills in calculation. When calculating, we can't try different combinations of the four numbers on the card, let alone fiddle with each other. Here are some common methods that are easy to learn and master:
1. Solve with 3× 8 = 24 and 4× 6 = 24.
Try to add the four numbers on the card face to 3 and 8, 4 and 6, and then multiply them. For example, 3,3,6 and 10 can form (10-6 ÷ 3) × 3 = 24, etc. For example, 2, 3, 3, 7 can be in the form of (7+3-2 )×
2. Use the operational characteristics of 0, 1 1 to solve it.
For example, 3,4,4,8 can form 3× 8+4-4 = 24,4,5, J and K can form11× (5-4)+13 = 24 and so on.
3. In the deck with solutions, the following six solutions are widely used: (We use A, B, C and D to represent the four numbers on the deck)
①(a—b)×(c+d)
Such as (10-4) × (2+2) = 24, etc.
②(a+b)÷c×d
Such as (10+2) ÷ 2× 4 = 24, etc.
③(a-b÷c)×d
Such as (3-2 ÷ 2) × 12 = 24, etc.
④(a+b-c)×d
Such as (9+5-2) × 2 = 24, etc.
⑤a×b+c—d
Such as11× 3+l-10 = 24, etc.
⑥(a-b)×c+d
Such as (4-L) × 6+6 = 24.
When students are playing games, they might as well try the above methods.
It should be noted that four cards (52 cards) in a deck can be randomly selected to have 1820 different combinations, among which 458 cards can't be counted as 24 points, such as A, A, A and 5.