Millimeter, the youngest brother, said magically, "Look, the thickness of the bank card, the thickness of the ruler and the thickness of the fingernail. .. all of them are 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.
2. Write a math story in meters and centimeters 100 One morning, Scampy came to his mother's bed and said to his mother, "Mom, mom! I had a dream. "
"Your dream is 323131335323635438+03431303 2365333E4893E5b19E313337661. Mom asked with a smile. The child thought for a moment, and then said, "In the morning, I got up from a 2m bed, picked up a 2m toothbrush, squeezed out 1 cm toothpaste to brush my teeth, and then washed my face and ate.
I walked 200 meters to school, sat on a 5-meter-high desk and chair, took out a 2-meter-long pencil case and a 5-mm-thick exercise book, and began to do the problem. In physical education class, the teacher organized the top sportsmen in the class, including me, to run two and a half laps along the 400-meter school playground runway, which is exactly 1000 meters.
Mom, do you think I'm tired?
"
"Tired, tired, tired, my son is really tired." Mother said anxiously, "Tomorrow weekend, your father and I will definitely drive you for a ride in the suburbs."
In the mathematics kingdom, rice and centimeter are good friends, one is fat and tall, and the other is thin and short. But one day they quarreled. Amy said he was very skilled, and CM said he was very skilled, so they asked the judges of the Mathematics Kingdom to judge him.
The judge said, "Please tell me the reason why you are so capable." . Mi Zhu said loudly, "I have great skills. For example, there are 100 m, 200 m, 800 m and 10000 m in running competitions. The height of the Yangtze River Bridge and Shanghai Oriental Pearl is meters. "
Not to be outdone, he said in centimeters: "The height of doors, the size of books and the measurement of precision instruments are all in centimeters, so I have great skills!" After hearing this, the judge smiled and said, "Don't argue, the big aspect needs meters to measure, the accurate measurement needs centimeters, and different units need to measure at different times." You are all important. I hope you can serve mankind better in the future! " .
3. Write a math story in meters and centimeters 100 One morning, Scampy came to his mother's bed and said to his mother, "Mom, mom! I had a dream. " "Your dream is 323131335323635438+03431303 2365333E4893E5b19E313337661. Mom asked with a smile. The child thought for a moment, and then said, "In the morning, I got up from a 2m bed, picked up a 2m toothbrush, squeezed out 1 cm toothpaste to brush my teeth, and then washed my face and ate. I walked 200 meters to school, sat on a 5-meter-high desk and chair, took out a 2-meter-long pencil case and a 5-mm-thick exercise book, and began to do the problem. In physical education class, the teacher organized the top sportsmen in the class, including me, to run two and a half laps along the 400-meter school playground runway, which is exactly 1000 meters. Mom, do you think I'm tired? . . . . 。” "Tired, tired, tired, my son is really tired." Mom said anxiously, "Tomorrow weekend, your father and I will definitely drive you for a ride in the suburbs. "
In the mathematics kingdom, rice and centimeter are good friends, one is fat and tall, and the other is thin and short.
But one day they quarreled. Amy said he was very skilled, and CM said he was very skilled, so they asked the judges of the Mathematics Kingdom to judge him. The judge said, "Please tell me the reason why you are so capable." . Mi Zhu said loudly, "I have great skills. For example, there are 100 m, 200 m, 800 m and 10000 m in running competitions. The height of the Yangtze River Bridge and Shanghai Oriental Pearl is meters. " Not to be outdone, he said in centimeters: "The height of doors, the size of books and the measurement of precision instruments are all in centimeters, so I have great skills!" After hearing this, the judge smiled and said, "Don't argue, the big aspect needs meters to measure, the accurate measurement needs centimeters, and different units need to measure at different times." You are all important. I hope you can serve mankind better in the future! "
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.
5. How to write rice in centimeters and meters in math diary and centimeters in math diary?
Friday, February 17 is cloudy with 2065438.
Today, when I was idle at home, I remembered the measurement and application of the length unit meters and centimeters that we learned. So I found my father's tape measure and my mother's rice measure, and measured the coffee table, TV cabinet, wardrobe and bed myself. The measurement results are recorded as follows:
The length of coffee table 150 cm is equal to 1.50 cm, and the width 1 m is equal to 100 cm. The TV cabinet is 2 meters long, equal to 200 cm, wide 1 m, equal to 100 cm, and the wardrobe is 2 meters long, 50 cm wide and 2 meters high. The bed is 2 meters long and 80 centimeters wide 1 meter.
I have measured these data and mastered the measurement method. I am very happy.
6. How to write meters, decimeters, centimeters and millimeters in letters? The symbol of meter is m, the symbol of decimeter is dm, the symbol of centimeter is cm, and the symbol of millimeter is mm.
Meters, decimeters, centimeters and millimeters are all units of length, which refers to the basic unit for measuring spatial distance and is the basic unit formulated by human beings to standardize the length. In the international system of units, the standard unit of length is "meter", which is represented by the symbol "m".
Generally speaking, "meter" is generally defined as the length of the distance traveled by light in the time interval of 1/299792458 s in vacuum. The unit of length adopted in China is consistent with the international system of units, that is, "meter" is the legal unit of length measurement in China.
Extended data:
Commonly used length units are: kilometer {kilometer} (km), decimeter (dm), centimeter (cm), millimeter (mm), micron (micron), nanometer (nm), picometer (pm) and femto meter (fm).
1 and km
Kilometer, also known as kilometer, is a unit of length, abbreviated as "km", which is usually used to measure the distance between two places. The common conversion relationship is as follows: 1 km (km) = 1 0,000m (m) = 1 00,000m (cm) =10,000mm (mm); 1.6 1 km = 1 mile.
2, meters
The unit of length "meter" in the international system of units originated in France. 1790 In May, a special committee composed of French scientists suggested that one fortieth of the total length of the earth meridian passing through Paris should be used as the unit of length-meter, and 179 1 year was approved by the French Parliament. This is the earliest definition of rice.
3, decimeter
Decimeter or dm is one of the metric units of length, and 1 decimeter is equivalent to one tenth of 1 meter. The common conversion relationship is as follows: 1 decimeter = 0.000 1 kilometer (km) = 0. 1 meter (m) = 10 centimeter (cm) = 100 millimeter (mm).
4 cm
The unit conversion of centimeters is as follows:1cm =10 mm = 0.1decimeter = 0.0 1 m = 0.0000 1 km.
5, hmm
Millimeter, also known as millimeter (or millimeter), is a unit of length and rainfall, and the symbol is ㎜. 1mm is equivalent to one thousandth of 1mm (this means "milli"). The decimal relation is as follows:1mm = 0.1cm = 0.01decimeter = 0.001m = 0.000001km.
6. Micron
Micron is a unit of length, and the symbol [micron] is pronounced [miú]. 1 micron is equivalent to one millionth of 1 meter (which means "micro"). The conversion relationship is as follows: 1 micron (micron) = 1 000 nanometer (nanometer) = 0.00 1 millimeter (millimeter) = 0.000 1 cm.
7. Nano
The original name of Nano is Nano, which is 10-9 meters (65438+ billionth of a meter). Like centimeters, decimeters and meters, it is a unit of measurement for length. It is four times the size of an atom and less than the length of a single bacterium. A single bacterial microorganism is invisible to the naked eye, and the diameter measured by a microscope is about five microns, which is five thousand nanometers.
For example, suppose that the diameter of a hair is 0.05 mm, and it is cut into 50,000 pieces on average in the radial direction, and the thickness of each piece is about one nanometer. That is to say, one nanometer is about 0.000001mm. Nanoscience and technology, sometimes called nanotechnology, is to study the properties and applications of materials with structural dimensions ranging from 1 to 100 nm.
8. Pimi (afternoon)
Pimeter (pieter or pm) is a unit of length, and 1 picometer is equivalent to one trillionth of 1 meter. Sometimes it is called a micron in atomic physics. The conversion relationship is as follows: 1 picometer =10-12m = 0.001nanometer (nm) = 0.0000 1 micron (micron).