Question 2: Tell me the meaning of each score below. (1)23/25 indicates that if the total population of China is regarded as 25, the Han population accounts for about 23. (2) 1/6 means that if the total land area of China is regarded as 6 parts, the area of Xinjiang accounts for about 1 part. (3) 1/20 means that if the world's total oil production is regarded as 20, then China's oil production accounts for about 1. (4) 1/5 means that if the total amount of air is regarded as 5 parts, the oxygen content accounts for about 1 part.
Question 3: Know the content of handwritten newspapers.
Question 4: Summarize the meaning and nature of the score. A brief analysis of the meaning and nature of fractions: This unit is the beginning of students' systematic study of fractions. The contents include: the meaning of fraction, the relationship between fraction and division, true fraction and false fraction, the basic properties of fraction, the greatest common factor and divisor, the least common multiple and general fraction, and the relationship between fraction and decimal. Students have used operation and intuition in their study in grade three and last semester.
Question 5: What does Yuan Xiaoying mean by mathematics? Significance of fraction: divide the unit 1 into several parts, and the number representing one or several parts is called fraction.
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Question 6: What does molar fraction mean? An object, a figure and a unit of measurement can be regarded as a whole "1". Divide the whole "1" into several parts on average, and the number representing such a part or parts is called a fraction. In the fraction, the denominator indicates how many parts the whole "1" is divided into, and the numerator indicates how many parts there are; One of them is called fractional unit.
To understand the meaning of decimals, we can start with the meaning of fractions, which can be explained by segmentation and synthesis activities. When a whole (reference quantity) is divided into equal parts, the quantity that gathers one part is called "component", and this "component" is expressed or recorded by "fraction". For example, it refers to a "component" in which an integer is divided into five equal parts and then aggregated into two halves. When the whole is divided into 10, 100, 1000, etc. Use another method to record the weight at this time-decimal. take for example
0. 1,
Record as 0.02,
Write it down as 0.005 ... and so on. The "."is called the decimal point, which is used to separate the integer part from the decimal part that cannot form an integer. Integers that are not 0 are called decimals, and those that are 0 are called pure decimals. So the meaning of decimals is part of the meaning of fractions.
The numerator and denominator are multiplied or divided by the same number (except 0) at the same time, and the size of the fraction remains the same, which is the basic property of the fraction.
Question 7: Tell the meaning of the following fractions and point out what I compare to the unit "1". This "vegetable field" is regarded as a whole "1", which is divided into 7 parts on average, with Chinese cabbage accounting for 3 parts.
The "full-month plan" is regarded as the whole "1", which is divided into five parts on average, with three parts in the first half of the month.
Question 8: I can't see the significance and nature of the math scores in the second volume of the fifth grade. Can you send it again?
Question 9: The meaning and nature of the score. 10 Jin is oil.
2/5-65438+3/00 = 1/00.
Oil * * * Yes.
10÷ 10 part 1 = 100 (kg)
I used it twice and still have some left.
100× (1-2/5) = 60 (kg)
Question 10: collecting handwritten newspapers. I am a pupil. I want to draw a handwritten newspaper on any topic. Be meaningful, with pictures and words, not too much.