Western Normal University Edition First Grade Mathematics Volume 1
People's Education Press First Grade Mathematics Volume 1
Beijing Normal University Edition Seventh Grade Mathematics Volume 1
People's Education Press Third Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
Beijing Normal University Edition Fifth Grade Mathematics Volume 1
Hebei Education Edition Third Grade Mathematics Volume 1
Hebei Education Edition Seventh Grade Mathematics Volume 2
Beijing Normal University Edition Seventh Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 1
People's Education High School Mathematics Edition B Compulsory Course 2
Beijing Normal University Edition Eighth Grade Mathematics Volume 1
Qingdao Edition Seventh Grade Mathematics Volume 2
Jiangsu Education Edition Fourth Grade Mathematics Volume 1
Qingdao Edition Second Grade Mathematics Volume 2
People's Education Press First Grade Mathematics Volume 2
!["Simple Application" Percent PPT Courseware 2](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/4ae59d4b-30cd-444b-975d-a6ff1b2cd099.webp)
Category | Format | Size |
---|---|---|
Hebei Education Edition Sixth Grade Mathematics Volume 1 | pptx | 6 MB |
Description
"Simple Application" Percent PPT Courseware 2
teaching objectives
1. Experience the process of understanding forest coverage data and information in my country and the world, discovering problems, raising and solving them.
2. Be able to comprehensively apply the knowledge learned to solve practical problems related to forest coverage.
3. Understand the gap between my country’s forest coverage rate and the world’s average forest coverage rate, and cultivate awareness of caring about national affairs and protecting the green environment.
(1) How many square kilometers has my country’s forest area increased in 10 years?
Observing the pictures, what information did you discover?
9.6 million square kilometers = 9.6 million square kilometers
9600000×16.55%=1588800 (square kilometers)
9600000×20.36%=1954560 (square kilometers)
1954560-1588800=365760 (square kilometers)
Answer: my country's forest area has increased by 365,760 square kilometers in 10 years.
(2) How many square kilometers are added each year on average?
365760÷10=36576 (square kilometers)
Answer: The average annual increase is 36,576 square kilometers.
(3) Based on the above estimates, how many years will it take to achieve the goal of my country’s forest coverage rate reaching 30%?
9600000×30%=2880000 (square kilometers)
2880000×1954560=925440 (square kilometers)
925440÷36576≈26 (years)
Answer: It will take about 26 years.
In conclusion
Forest coverage = forest area/land area × 100%
Given the forest coverage rate and land area (a quantity represented by the unit "1"), calculate the forest area by multiplication, and forest area = land area × forest coverage rate.
practice
1. The following are statistical tables of forest resources in several countries.
(1) The order of forest areas owned by the three countries from largest to smallest is ______, ______, ______.
(2) The order of forest coverage in the three countries from high to low is ______, ______, ______.
(3) Based on the data in the table above, calculate the approximate land areas of the three countries. (Results are retained as integers)
2. my country’s “Three North Shelterbelt Project” plans to afforestation 3,560 hectares by 2050. As of 2003, 66% of the afforestation plan has been completed. How many thousands of hectares have been reforested?
3560×66%=2349.6 (10,000 hectares)
Answer: 23.496 million hectares of forest have been planted.
3. In 2011, my country's "National Key Forestry Projects" completed afforestation area of 3.0939 million hectares, of which the forest restoration project accounted for 12.18% of the total afforestation area. What was the total afforestation area completed by converting farmland into forests in 2011?
309.39×12.18%=37.68 (10,000 hectares)
Answer: In 2011, a total of 376,800 hectares of farmland were converted into forests.
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For more information about the "Simple Application of Percents" PPT courseware, please click on the "Simple Application of Percents ppt" ppt tab.
"Simple Application" Percentage PPT Courseware:
"Simple Application" Percentage PPT Courseware Teaching Objectives 1. In specific situations, experience the process of discovering problems, raising and answering simple practical questions. 2. Be able to ask mathematical questions related to percentages in real-life situations, and be able to answer simple practical questions about percentages.
"Simple Application" Ratio and Proportion Flash Animation Courseware 2:
"Simple Application" Ratio and Proportion Flash Animation Courseware 2 This courseware is a simple application Flash animation courseware for the second unit of the sixth grade mathematics volume of the Hebei Education Edition. The content is vivid, please download! Keywords: ratio and proportion teaching courseware, simple..
"Simple Application" Comparison and Proportion Flash Animation Courseware:
"Simple Application" Flash Animation Courseware for Ratios and Proportions This courseware is a simple application Flash animation courseware for the second unit of the sixth grade mathematics volume of the Hebei Education Edition. The content is vivid, please download! Keywords: ratio and proportion teaching courseware, simple application...
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Update Time: 2024-09-05
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