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Today, the sun is shining, I was reading "Primary School Math Olympiad" at home, and suddenly found such a problem: compare the size of the two scores of 1111 111 and 11111 1111. Suddenly, I became interested, picked up the pen and "brushed" on the straw paper, and after a while, I found a solution.
That is to turn these two false fractions into band fractions, and then use the law of fractions, the smaller the numerator fraction, the larger the fraction. Solve 1111 111 < 11111 1111. After solving it, I was very happy and boasted:
It seems that no problem can bother me. My mother, who was knitting a sweater, listened to me, looked at the question, and laughed loudly: "Yo, I thought it was a difficult problem, isn't it just a simple comparison of the scores?"
After listening to my mother's words, I immediately got angry and said, "What, this question is difficult." After saying that, I sarcastically called my mother again:
How tall you are, this question is not a piece of cake for you! Mom smiled: "Okay, okay, I won't mess with you, but if you can solve this problem in two ways, then it will be considered a high level."
I listened to my mother's words and looked at the question again, and couldn't help but be stunned for a moment, "There is another solution." I said in surprise. "Of course," said Mom, "Well, you won't do it, it seems that you are still at a low level."
I was very angry at my mother's words, and I did it again to prove that I was a high-level person. Finally, after some hard work, the second method came out, and that is to use division to compare the sizes between them. You see, if a number is less than another number, then the quotient of this number divided by another number must be a true fraction, and in the same way, if a number is greater than another number, then this number divided by another number, the quotient must be greater than 1.
Using this rule, I use 1111 111 11111 1111, because these numbers are too large to be multiplied directly, so I changed this division equation a bit, let's say there are 8 1s, let you form two numbers, what is the largest product of the two numbers. Needless to say, there must be two closest ones, so 1111> 111 11111, then that is 1111 111> 11111 1111.
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The content of the math diary can be written according to the table of contents of the math textbook, not only in combination with your own life, but also in the story. A math diary can be both realDocumenting the application of mathematics in your life, whether it is an imaginary fairy tale or a fictional story.
The standard format should first come up with a new name that catches people's eyes. Second, there should be a date, weather, and day of the week on the other line. At the end of the three, there is a class and a tutor written on it.
Unique selection of materialsWriting a math diary is like writing an article, the selection of materials is very important, the selection of materials must be innovative, and the perspective must be unique in order to write a good math diary.
For example, summarize and sort out the knowledge learned in each unit. For example, in the unit of "Four Operations" that we have learned, students can sort out the knowledge in this unit, only addition and subtraction or only multiplication and division, and calculate them in order from left to right.
Formulas without parentheses have addition and subtraction and multiplication and division, and multiplication and division must be calculated first, and then addition and subtraction. For the four equations with parentheses, the ones in the parentheses must be calculated first. Through this combing, the following is accompanied by a few examples of four operations.
There is a difference between a mathematical diary and an ordinary diary, the biggest difference is that the knowledge points must appear in the mathematical diary, and the mathematical diary is scientific, whether it is worded or not, the data must conform to objective facts and objective laws.
Mathematics diary: Advantages of mathematics diary: As I learned earlier, mathematics diary is a written expression of mathematical knowledge, which reviews mathematical knowledge while improving writing ability, and the difficulty of writing mathematics diary is relatively small and easy to use.
Fill in the blanks with math diary examples: There is no limit to the number of words in a math diary, you should create a scenario for a knowledge point, and then explain the math knowledge point clearly, the number of words must be a lot.
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