[VioEdu TV] Bài dự thi đội Quận 5 vòng chung kết Đấu trường toán học TP.Hồ Chí Minh 2021-2022

Ladies and gentlemen, we are team 50A from District 5, Ho Chi Minh City. I am the strong star, Hoanh Khai Nhi, class 1-4, Tran Tieu Hong school. I am the brave star, Nguyen Ho Minh Nghiep, class 2-6, Tran Minh Trong school. I am the lucky star, Van Cong Minh Nguyen, class 3-10, Tran Tieu Hong school. I am the hopeful star, Le Quang Minh, class 4-1, Tran Tieu Hong school. I am the brave star, Bich Phuong, class 5-2, Bao Sen school. I am the small star, Toa Sang, class 1-2, Toan Hoc V.O.E. school. This is the calculation that the judges have given to me. I will present it as follows. Based on the calculation, I will spend 40,000 VND to buy the cake in the next class. According to the calculation, no matter which cake I sell, after selling it, I will have 5,000 VND in my pocket. Therefore, the amount of money I have after selling the cake is ... Therefore, I will spend 40,000 VND to buy 4 types of cakes, so that the amount of money I have after selling the cake is the most, I would like to ... I would like to go to class 3-8 as follows. In the first lesson, the amount of money I have in my pocket is 150,000 VND. The amount of money I have in my pocket is 100,000 VND. The total amount of money in my pocket is 250,000 VND. For the second lesson, after selling 60 cakes, the total amount of money I have is 240,000 VND. For the first lesson, there will be more money than the second lesson, so I will choose the first lesson to be more profitable. The lesson of class 4 also does not make it difficult for me. According to the topic, the price of 2 items is 7 pieces, the second item is 3 pieces, the first item is 4 pieces. But 4 pieces correspond to 48,000 VND, so 1 piece will be 12,000 VND and 3 pieces will be 36,000 VND. So the price of the second item is 36,000 VND. According to the topic, we can see that the price of the product is only 90% compared to the original price. And after discounting the price, the amount of goods sold is 130%. So the amount of money earned after discounting the price is 117%, which is 17% higher than the original price. So the store earns more than 17% compared to when the store does not discount the price. Guys, I heard that the South Campus is working to help 2 students who are in the same situation as me. So I will help 2 students. So I will contribute 500,000 VND. I bought 2 books for 80,000 VND. Can you help me contribute 80,000 VND? So I can save 20,000 VND per day for 1 week. So I have 27,000 VND and 140,000 VND to help 2 students. I bought books for 80,000 VND. So I have 420,000 VND left. I also contribute 1 million VND. So we have 1,940,000 VND left. I will ask my mom for 60,000 VND more to help 2 students. Agree! So we contribute 2 million VND. I will help 2 students. So each of you will get 1 million VND. You can use this money to buy books. Mathematics is really amazing. We have been using it for a long time to calculate quickly. For me, mathematics is like a night sky. There are many mysteries that humans have not yet understood. The deeper you understand, the more you like to do math. That's right. Before I went to buy books, I had to ask my mom how to calculate money. Now I know how to do math. When I go shopping, I can calculate by myself. I see that I need 4 computers to do everything. The lessons of VOEDU are very lively. The exercises are carried out at all times and places. There are also very attractive school games. Since then, the use of mathematics in life is like spending money every day, saving money and using money wisely. We met today thanks to this new school game. Thank you VOEDU for creating an attractive and useful game for us. Thank you VOEDU. We are very happy because today we have prepared a small gift to help you with your difficulties. Let's shine together like the stars. Stars, stars. The school of mathematics is always at the top.