You should talk about your cognition, what you have learned, what you have learned and how you learned it. What other questions won't? You can talk about it all, or you can talk about the application of these units. These quantitative units are indispensable in life.
2. Write math diary in kilometers, meters and centimeters. Today, I came across such incredible data in a book: "A piece of paper with a thickness of 0.0 1 cm is even thicker than Mount Everest after being folded in half for 30 times?" This data is a bit "absurd" no matter how you listen to it.
After all, it is a thin piece of paper. Can folding in half really surpass Everest? But many unexpected things may happen, so only through calculation can we uncover the mystery of all this. Immediately I multiplied 0.0 1 cm by 2,1* * 30 times to get10737418.24cm..
Then, I converted the height of Mount Everest from 8848. 13 m to 8848 13 cm. By comparison, it is obvious that the thickness of paper folded in half for 30 times is indeed better than the height of Mount Everest, which is more than 10 times of the latter. In fact, amazing data like this are everywhere in ordinary life, as long as you have a pair of eyes that are good at discovering.
3. How to write the composition of millimeter decimeter centimeter One day, the length unit quarreled and said that they had contributed the most.
Millimeter, the youngest brother, said magically, "Look, the thickness of the bank card, the thickness of the ruler and the thickness of the fingernail. .. are all me, so my contribution is great. " The second brother proudly said, "Look, the length of the eraser, the length of the mobile phone and the length of the chalk.
It's all me. I should contribute the most. "The third brother decimeter said without weakness:" No, no, I contributed the most. You see, a pen is the width of a small exercise book.
It was all me. "
The fourth brother said without thinking, "None of you are as big as me. Look, the length of the table is meters, and the length of the blackboard is meters. I have to be used by the conductor, so I should make the greatest contribution. " Big brother Qian Mi also came to join in the fun: "Look, the length of the playground is me, the length of the expressway is me, and the length of the airport is me.
So this is my greatest contribution, because life cannot be separated from me. "
They are quarrelling more and more fiercely, and they are about to fight. At this moment, Grandpa Sun spoke: "You are all very useful, and no one can live without anyone. For example, the height of the table is 2 meters, 3 minutes and 5 millimeters, and nothing is lacking. "
They all blushed when they heard father Sun's words. Father Sun stopped making noise.
From then on, they learned from each other, helped each other and never quarreled again.
4. How to write the weekly diary about meters and centimeters? You can dream the following story in the background of a dream:
Mi and cm turned out to be good friends. Mi is tall and long, and cm is short and short. One day, while measuring the length of the blackboard, he stopped Amy. When Mi came back, he held his head high and said to CM, "Brother CM, look how tall I am. 100 little people like you add up to be as tall as me. 1 m = 100 cm, how useful I am! " Cm said, "Don't underestimate me. Although I'm a little small, I'm as good as you. Don't trust us! " "
Amy and cm come to the second grade classroom. Mi smiled and said, "Just now, I measured the length of the blackboard, which is exactly 3 meters. Then measure the length of the blackboard. " Unconvinced, Cm said, "What's the big deal in terms of quantity!" It took a lot of effort to measure the length of the blackboard. At this time, Mi said to Cm in a sarcastic tone: "How about brother, let me measure rice quickly!" " "Cm looked at Mi, ignored him, looked around the classroom, and then said to Mi," now let's measure the width of the table. Let's measure it first. "The metric of meters is less than 1 meter. How to express it in meters? The children are puzzled. At this time, the centimeter has also been measured, which is 45 centimeters. Cm smiled and said to Amy, "What's the matter? Miguel can't do it this time! " Amy said unconvinced, "although I can't measure the width of the table, I still have great skills." Cm also showed no weakness: "Miguel, don't think you can do it. I am the best in many cases! " "
Their quarrel alarmed Grandpa Wisdom, who smiled and said, "Children, you are two units of length with different sizes. Each of you has your own advantages and disadvantages. There are many members in your family. It takes kilometers to measure a larger length, and there are light-years for those larger than kilometers. Don't be proud of your centimeter penis. Not when measuring smaller and shorter objects. You need millimeters, and there are smaller units of length than millimeters, such as microns, omega and nanometers. " After listening to Grandpa Wisdom, Mi and CM bowed their heads in shame.