Interesting math diary 1 This afternoon, the teacher said that the homework in the evening was to study the perimeter of various figures. The teacher told a group of students that the graphics you learned were crescent and leaves. Then the teacher explained the research method in detail, and then asked a group of students and the whole class: "Do you understand?" The teacher asked two groups of students to study the pentagram. The teacher drew two diagonal rectangles on the blackboard and marked the lengths of the two sides, saying, "Three groups of students study this figure." I drew it as soon as I saw it.
When I got home, I looked at this figure carefully and thought: every side of this figure is straight, and it should be measured with a ruler. But on second thought, don't you have all the data? If there is data, it will not be used. So I decided to use the formula, you can first find the circumference of a rectangle, and then multiply it by 2.
My second method is to turn one of the rectangles up into a very long rectangle, then calculate the length of this figure, multiply it by 2, and then calculate the width of this figure multiplied by 4, so that the circumference of this figure can also be calculated.
Oh, it turns out that there are so many ways to calculate the perimeter of this small figure. I will think more about it in the future and find the simplest method to calculate the perimeter of the figure.
Interesting math diary is sunny on Sunday, February 15.
50 times 2
100 has become famous in the mathematics kingdom recently, and many figures want to make friends with 100. Fortunately, 50 and 2 are chosen as its two factors by 100.
However, 50 and 2 soon quarreled, and both wanted to be the first factor.
50 said, "Little fellow, if I hadn't multiplied you by 50, you wouldn't have reached 100. I made a great contribution. Let me be the first. "
2 said, "Idiot, if I hadn't multiplied you by 2, you wouldn't have reached 100. I made a great contribution. Let me be the first. "
Children, do you think it is necessary for them to quarrel about this?
Interesting math diary is cloudy on Friday in March 1 Sunday.
Today, my mother took me to the shopping center. I learned a lot in the shopping center. My mother and I bought vegetables first. My mother gave it to aunt 50 yuan, the shop assistant, and she took it back to 38 yuan. My mother asked me, "How many vegetables did we buy?" Without thinking, I blurted out: "12 yuan." Mother nodded happily. Later, my mother took me to buy books. A book 4 yuan 4 jiao. How much are two books? Think about it this time: 4 yuan 4 Corners +4 yuan 4 Corners =8 yuan 8 Corners, yes, it is 8 yuan 8 Corners. Yes, I got it right again! I see: Mathematics is very useful in life. Discover the mathematical problems in life, use your brains to solve them actively, and truly realize the true meaning of "there is mathematics everywhere in life".
How proud it is to use the knowledge learned in class to solve the math problems in life and get praise from others! That kind of excitement, that kind of happiness is beyond words.
Interesting math diary 4 Interesting mathematics is more and more liked by students. Not only humor, but also develop children's intelligence. Parents often buy some interesting math books for their children. The online editor also sorted out the mathematics in the diary of the first grade of primary school in the children's edition of the People's Education Edition. Come and have a look!
Today is the Dragon Boat Festival. My mother bought dumpling wrappers, and our family happily wrapped jiaozi. I got 15, my dad got 2 1, and my mom got 30. My father said he would test my math study. The question is: How many jiaozi? 15+2 1+30=66 (pieces). Jiaozi is ready, I ate 10, my father ate 25, my mother ate 5, and my mother said, how many are left? 66- 10-25-5=26 (a) My parents smiled happily and praised me for learning math well.
Interesting mathematics plays a vital role in children's learning. I hope that the mathematics in My Diary of the First Grade of Primary School published by People's Education Publishing House comes from life and can help children's intellectual development.