Math diary, first grade, first article.
20 1X year x month x day x week x sunny.
Why are wheels round? Because if the wheels are square or triangular, the car will be bumpy, while the round wheels will be flat and the car with round wheels will be comfortable to sit on, so the wheels are round. I also found that octagon is more like a circle than hexagon, and hexagon is more like a circle than quadrilateral.
Math diary, Grade One, Chapter Two.
20 1X year x month x day x week x sunny.
One day, I was doing my homework quietly at home. After a while, I finished my homework. I went to watch TV. I saw those colorful bubbles on TV. They are beautiful. I turned off the TV and went to find four friends. We made bubble water with our own soapy water. We blow big and beautiful bubbles together. I said, "Let's count how many we played together!" " Divide the bubble we blow together by 5 and see what it is.
The next day I blew 1 1, Xiaohong blew 10, Xiaoming blew 15 and Xiaojun blew 14. We will use it; 11+10+15+14 = 50. In use; 50 divided by 5= 10 (pieces). Let's talk at the same time; Ha ha! Equal to 10. ; Looking at these beautiful big bubbles, we are all deeply attracted by them. It seems that we all forgot to go home.
Math diary, Grade One, Chapter Three.
20 1X year x month x day x week x sunny.
This afternoon, I had nothing to do at home, so I picked up a math extracurricular reading and read it. I saw a topic like this:
Xiaohong wrote a seven-digit number, three eights and four zeros. When Xiaohong read this number, her grandmother only heard Xiaohong read two zeros. Ask Xiaohong what this number might be.
I thought hard, thought over and over again, and finally came up with four different answers in order. The four different answers are: 8080800, 8080080, 8080008, 8000808.
From this topic, I understand that no matter what topic you do, you can't just be satisfied with coming up with an answer. Only by considering problems comprehensively and orderly and developing good thinking habits can we really learn mathematics well.
Math diary, Grade One, Chapter Four.
20 1X year x month x day x week x sunny.
A century has 100 years; There are 365 a year? 366 days; There are 12 months in a year; 28 a month? 3 1 day; There are 24 hours in a day; There are 60 minutes in an hour; There are 60 seconds in a minute; There are 100 milliseconds in a second. Current time: 2 1 century, March 2, 20031,13: 25, 30 seconds and 49 milliseconds. I can record this time, but I can't stay still.
It turns out that time is also related to mathematics, and its biggest feature is that it can't go back and can't come again! So I must hurry up and never waste time!
Math diary, Grade One, Chapter Five
20 1X year x month x day x week x sunny.