"Scientific Notation" Rational Numbers and Their Operations PPT

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"Scientific Notation" Rational Numbers and Their Operations PPT

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Use scientific notation to express larger numbers

1. The correct way to express the number 15000 using scientific notation is (C)

A.15×103 B.1.5×103

C.1.5×104 D.1.5×105

2. The land area on the earth is about 149,000,000 square kilometers. Expressing 149,000,000 in scientific notation should be (B)

A.0.149×109 B.1.49×108

C.1.49×109 D.14.9×107

3. Guangzhou’s National Day tourism statistics in 2018 received a total of about 15,000,000 tourists. 15,000,000 is expressed in scientific notation as 1.5×107.

Knowledge point 2: Given a number expressed in scientific notation, find the original number

4. The Chinese aircraft carrier Liaoning is the first aircraft carrier of the Chinese People's Navy that can carry fixed-wing aircraft. The ship's full load displacement is approximately 6.75×104 tons. The original number of this data expressed in scientific notation (B)

A.6750 B.67500

C.675000 D.6750000

5. (Original) If an integer 12500...0 is expressed as 1.25×1010 in scientific notation, then the number of "0" in the original number is (B)

A.5 B.8 C.9 D.10

6. If 3080000=3.08×10x, then x= 6.

Scientific Notation PPT, Part 2: Improvement of Comprehensive Ability

7. China’s territorial water area is about 370,000 km2, of which the territorial water area in the South China Sea accounts for about 1/2 of my country’s territorial water area. Using scientific notation, the territorial water area of ​​the South China Sea is about (D)

A.37×105 km2 B.37×104 km2

C.0.85×105 km2 D.1.85×105 km2

8. According to Xinhua News Agency’s China Youth Network, a new list of the world’s top 500 supercomputers was released. Chinese supercomputers “Sunway TaihuLight” and “Tianhe-2” occupied the top two spots on the list for the third consecutive time. “ "Sunway TaihuLight" has been certified by Guinness World Records as the "fastest computing computer" in the world. It has a total of 40,960 processors. 40,960 is expressed in scientific notation as (B)

A.0.4096×105 B.4.096×104

C.4.0960×103 D.40.96×103

Scientific notation PPT, the third part: Expanding exploration and breakthroughs

11. The sun is a hot and huge gas planet that is losing mass at a rate of 4 million tons per second. The diameter of the sun is about 1.4 million kilometers, while the radius of the earth is about 6378 kilometers. Please record the above three data in scientific terms. Express it numerically and then calculate:

(1) How many thousands of tons of mass does the sun lose in one year? (calculated as 365 days in a year)

(2) Approximately how many earths can be placed on the diameter of the sun?

Solution: 4 million = 4×106, 1.4 million = 1.4×106, 6378 = 6.378×103.

(1)400×365×24×3600=1.26144×1010 (10,000 tons).

Answer: The sun loses 1.26144×10.1 million tons of mass in one year.

(2)140×104÷(6378×2)=1.40×106÷(6.378×103×2)≈110(pieces).

Answer: Approximately 110 earths can be placed on the diameter of the sun.

Keywords: Beijing Normal University Edition seventh-grade mathematics PPT courseware free download, scientific notation PPT download, rational numbers and their operations PPT download, .PPT format;

For more information about the "Rational Numbers and Their Operations in Scientific Notation" PPT courseware, please click on the Rational Numbers and Their Operations PPT Scientific Notation PPT tag.

"Scientific Notation" Rational numbers and their operations PPT download:

"Scientific Notation" Rational Numbers and Their Operations PPT Download Part One Content: Learning Objectives 1. Be able to use scientific notation to represent large numbers, and be able to restore large numbers expressed in scientific notation to their original numbers. (Key Points) 2 . Summarize the relationship between exponents and integer digits in scientific notation..

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Update Time: 2024-10-03

This template belongs to Mathematics courseware Beijing Normal University Edition Seventh Grade Mathematics Volume 1 industry PPT template

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