8th Grade Pre Algebra

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Mr J

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Quizzes Created: 1 | Total Attempts: 253

Questions: 6 | Attempts: 253 | Updated: Apr 19, 2024

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As you are getting to know how fun algebra is so far you should ensure you get practice material for every topic you cover after class. The quiz below is set to test your understanding on scientific notations, how to make them and expand them. Give it a try and see how good you are.

Questions and Answers

1.

Identify the boy in 2.45 x 10 ³
2.

If x is tripled and then decreased by 2, the result is 13. What is the value of x?
3.

Express the following in scientific notations: 210,000,000

Explanation
The given number, 210,000,000, is expressed in scientific notation as 2.1 x 10^8. In scientific notation, a number is written in the form of a decimal number between 1 and 10, multiplied by a power of 10. In this case, the decimal number is 2.1, and the power of 10 is 8. This notation is commonly used to represent very large or very small numbers in a concise and standardized format.

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4.

Write .00000325 in scientific notations.

Explanation
The given number, 0.00000325, can be written in scientific notation as 3.25 x 10^-6. In scientific notation, the number is expressed as a decimal between 1 and 10 (in this case, 3.25) multiplied by a power of 10 (in this case, -6). The negative exponent indicates that the decimal point is moved 6 places to the left, resulting in a very small number.

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5.

Write 0.45 x 10 ⁹ in scientific notations

Explanation
The given number, 0.45 x 10^9, can be expressed in scientific notation by moving the decimal point one place to the right and adjusting the exponent accordingly. This results in 4.5 x 10^8.

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6.

Write 652.8 x 10 ⁶ in scientific notations

Explanation
The given number, 652.8 x 10^6, can be expressed in scientific notation by moving the decimal point to the left until there is only one digit to the left of the decimal point and multiplying it by a power of 10. In this case, we move the decimal point 6 places to the left, resulting in 6.528. Since we moved the decimal point 6 places, we multiply by 10^6. Therefore, the number can be written as 6.528 x 10^8.

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