We went to a restaurant for dinner, and my father asked me to buy drinks, and I readily agreed.
I took 20 yuan, ran into the store and began to choose our favorite drinks. First of all, I chose three bottles of 500 ml drinks and one bottle of 6 yuan 9jiao. At that time, I took it as the 4 yuan 9 horn on other brands. I thought it was enough, so I went to the cashier to check out. It is conceivable that there is not enough money! 6.9 (original number) × 3 = 20.7 yuan! Oh! Oh, my god. I had to ask Wang Yukang for money from my father. I went there again to have a look. Actually, there is a 1500 ml, a large bottle of beverage, and a 200 ml small bottle of beverage, and it is a pure fruit juice beverage of the same brand, only 16.9 yuan! It's perfect! So I decided at once that I should buy a big bottle of drinks. And Wang Yukang, who ran away for nothing.
Mathematics in life is really everywhere!
The notes of the second math week in the fourth grade of primary school can't be said to be difficult or simple. Although simple, these are all basic things and indispensable. Numbers and algebra are necessary here. Because I studied Olympiad, I was exposed to numbers and algebra at an early age. Once, I met a trouble in my study-I couldn't do an Olympic math problem. I think hard, but I can't find the standard answer in my heart. I was anxious in all aspects, so I came up with an idea-ask our math teacher. I am very nervous, take a deep breath, close my eyes and ask the teacher what to do before leaving! I hurried to the teacher, who was clearing the table. I said inexperibly, "old teacher, there is a question I don't understand." Please help me solve it! " "The teacher looked at me and took the book without hesitation. He glanced at the question, frowned and thought a little. Then he calmly took out a flat single-line paper from his bag and took out a pen. He gave me a list of ways to solve the problem, and told me carefully while listing it carefully. "This should be calculated like this. If this one is wrong, it's all. "He gave me a clear idea and made me nod again and again. The teacher not only let me know the solution to this problem, but also let me understand a solution. The question at the back of the book was easier for me, and now it's really a piece of cake for me. After that, I thanked the teacher again and again and said, "Thank you so much. You told me about this problem. During the exam, I ... "The teacher also smiled and was happy for me. From then on, I fell in love with mathematics and thinking. Gradually, I learned more and more questions and became more and more interested in mathematics. In fact, it is not difficult to learn mathematics. The key is to find the knack and be willing to ask questions to people around you. Only in this way can your math level be improved step by step. It is not difficult to learn mathematics. What is difficult is how to enter the hall of mathematics.
I am a "math idiot", but at the same time I am also a little math fan. In our daily life, we encounter math problems every day. I met a math problem again today.
This morning, my family ate the cake baked by my mother. I want to eat two cakes, my father wants to eat three cakes, my mother wants to eat two cakes, and my sister only needs 1. At this time, my mother asked me how to eat cake as soon as possible. How many minutes will it take? I immediately thought of baking one by one, but it takes about 3 minutes to bake one side of a cake. When can I have the cake I want? I thought again, my mother bought a pot so big that she only burned one cake at a time. It's a waste of space in the pot. You'd better bake more cakes at a time. "Mom, how many cakes can a pan bake at most?" Mom replied, "You can only bake two cakes at most".
When I heard my mother say this, I began to calculate with confidence. It takes 3 minutes for two cakes to bake one side at a time and 6 minutes for two sides. A total of eight cakes are needed, and eight cakes can be divided into four and two cakes, so it takes six minutes to bake two cakes at the same time, which is equal to 24 minutes. All the formulas are: 2×3=6 (minutes), 8÷2=4 (pieces), 4×6=24 (minutes). I told my mother what I thought, and my father heard it and said to my mother, "Yes, that's great!" " ! I am also very happy
Laughed.
Mathematics is everywhere in life, which makes me deeply like mathematics. It exudes charming charm and fascinates me.
This week, we learned new knowledge and observed objects.
Generally speaking, the same object may have different shapes from different angles. There are many objects whose shapes are completely different from different angles, such as a cylinder, which is round from above, and may be square or rectangular from the side and front.
When there are several small cubes in a graph composed of a group of small cubes, the best way is to look from the top first and then from the side. If there is a bulge, there must be a small cube below.
When drawing a graphic section consisting of a set of cubes, the front row is drawn in the back and the back row is drawn in the front.
This is my harvest in a week.