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People's Education Press Second Grade Mathematics Volume 1
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Beijing Normal University Edition Eighth Grade Mathematics Volume 1
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Jiangsu Education Edition Fourth Grade Mathematics Volume 1
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People's Education Press First Grade Mathematics Volume 2
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Category | Format | Size |
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Jiangsu Education Edition Sixth Grade Mathematics Volume 1 | pptx | 6 MB |
Description
"Reading and Writing Percents" Understanding Percents PPT Courseware
Think about it and talk about the meaning of the percentage in the question.
(1) In the midterm exam, the passing rate of my class is 100%, which means __________, and the excellent rate is 88%, which means __________.
(2) To build a road and 50% of it has been built means __________.
(3) According to the preliminary accounting assessment of the National Bureau of Statistics of my country, China's GDP increased by 9.1% in 2003 compared with 2002, which means __________.
(4). There are 40% more girls than boys in Class 64 of Yucai School, which means __________.
Read each percentage below.
⑴ 5% is pronounced as __________.
68% is pronounced __________.
⑶ 0.37% is pronounced as __________.
⑷ 200% is pronounced as __________.
⑸ 246.5% is pronounced as __________.
Write the percentages below.
Percents are usually not written as fractions, but are expressed by adding "%" after the original numerator.
⑴ Forty percent write __________.
⑵ Nineteen percent write __________.
⑶ One hundred and two point five percent is written as __________.
read it
1. According to statistics, my country suffers from serious water and soil erosion, with an area of 179.4 square kilometers, accounting for 18.7% of the land area. Water source pollution has increased significantly, with 42% of urban water sources polluted. Desertified land accounts for 15.5% of the land area.
2. There are 190 students in the sixth grade of our school, among whom 10% are myopic.
3. Disposable chopsticks were invented by the Japanese. Japan’s forest coverage rate is as high as 65%, but they rely entirely on imports of disposable chopsticks. my country’s forest coverage rate is less than 14%, but it is a major exporter of disposable chopsticks.
4. my country’s water resources pollution has increased significantly. 42% of urban water sources are polluted.
Fill it out:
1. The percentage unit of 76% is ( ), and there are such units as ( ).
2. I have read 88% of a book, and there is ( )% left.
3. The speed of a car is 15% faster than that of a motorcycle, and the speed of a car is that of a motorcycle ( ).
4. There are ( ) 1/10 and ( ) 1% in 3.
5. The number of female workers in a certain workshop accounts for 52% of the total number of workers in the workshop, then the number of male workers accounts for () of the total number of workers in the workshop.
6. The output this year is expected to increase by 8% compared with last year, and the output this year is expected to be () that of last year.
Answer the following questions and explain why?
1. 80% of a rope is used, and 20% of the meter is left. Is this sentence right? Why?
2. The turnover of PARKnSHOP in October is equivalent to 105% of that in September. Is the turnover in October more or less than that in September? Why?
3. Rope A is 1/4 meter longer than rope B. It can also be said that rope A is 25% longer than rope B. Is this sentence right? Why?
The length of the rope is a specific quantity that cannot be converted into a percentage. No percentage can represent a specific quantity. A percentage only represents the ratio between two numbers, and cannot be followed by a unit name.
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For more information about the PPT courseware "Understanding Percents, Reading and Writing Percents", please click the "Understanding Percents ppt, Reading and Writing Percents ppt" tag.
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Update Time: 2024-09-09
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