1. Basic information of the 24-point contest
The 24:00 Contest of Class C1308 of the High School Attached to Tsinghua University was held in Class C1308 on the afternoon of September 18, 2014。The competition was proposed by teacher Wang Taihua, co-hosted by Sun Le Han, Wu Siyu, Fang Mingyang and Pan Yue, hosted by Sun Le Han and Wu Siyu, sponsored by ICBC。
From the class of 30 students, divided into ten teams, two groups to compete。The students use their own computing ability to launch a speed and accuracy competition, and jointly interpret a calculation event for math lovers。
The theme of the 24-point competition is "Experience, Fun and Improvement".。It aims to improve the students' fun of learning mathematics, enrich their after-school life, and create a learning atmosphere for the class to enter mathematics, get close to mathematics and love mathematics。
Two, 24 points competition rules introduction
1. 24-point introduction
24 points is a puzzle game, 24 points is the 4 integers (generally positive integers) through addition, subtraction, multiplication, division and parentheses operation, so that the final calculation result is 24 a mathematical game, 24 points can test people's intelligence and mathematical sensitivity, it can improve people's mental arithmetic ability in the game。
24 points is usually the use of playing cards to play the game, a deck of cards to draw the size of the queen left 52, arbitrarily draw 4 cards (called the deck), with addition, subtraction, multiplication, division (can add parentheses) to the number on the card surface into 24。Each card must be used only once, if the card drawn is 3, 8, 8, 9, then the formula is (9-8) ×8×3 or 3×8÷ (9-8÷8) or (9-8÷8) ×3。
2. Competition schedule
(1) Group Stage (First appearance)
Divided into two groups A and B according to the drawing of lots。Group A is the Meizhan Group (Shenzhong Dou), Group B is the Zhanshen group (Jianzhong Ju).。There are five teams in each group, and each team consists of three people。Answer four questions on paper, time for five minutes, and rank according to the answer time, the last one is out。
(2) Elimination Round (Battle of the Gods)
Draw lots first, four games, combat seats, the topic is randomly selected playing cards, after the inspection commission verification, the topic is written on the blackboard, two wins in three games, and finally the final four。
(3) Third place match
Rules are the same as elimination。
(4) Peak showdown
The difficulty of the question is increased, and the champion is determined by winning three out of five。
Third, impressions and gains
Mathematics learning, calculation fast and accurate is the basic skills, through the 24 points competition, improve the students' oral arithmetic, mental arithmetic ability。
Calculation is the practical means to embody mathematical thought and mathematical knowledge, and it is the main theme throughout the whole mathematical study。Although there are various types of calculations, each has its own set of strict and uniform rules。Calculation takes practice over and over to make perfect。The "official document education", which began in Japan in 1954, divided the mathematics learning process into "calculation" and "knowledge", that is, they practiced various calculation methods before learning mathematics content when they did not understand it at all, and achieved great success。This shows that we can completely regard computing as a separate "art" to continue to learn and study。Simple calculation is repetitive and boring. With the form of limited time competition, learners can make full use of competition and sense of achievement to drive them to the end of calculation!
The competition was highly enthusiastic, the referee was serious and responsible, the audience was cheering outside, and the competition atmosphere was tense and enthusiastic, and it achieved a complete success。
