How to write a decimal in scientific notation

The video tutorial explains how to move decimal points and use scientific notation. It covers the importance of placing the decimal correctly between one and ten, and how to calculate exponents, including negative exponents. The tutorial concludes with a brief Q&A session.

Why is it important to move the decimal point when working with numbers in scientific notation?

• To make calculations easier

• To ensure the number is between 1 and 10

• To change the number's value

• To make the number larger

What is the correct form of the number 0.49 in scientific notation?

• 0.49 x 10^1

• 4.9 x 10^-1

• 4.9 x 10^0

• 49 x 10^1

How many places do you move the decimal point to convert 0.00049 to 4.9 in scientific notation?

• 4 places to the right

• 3 places to the left

• 4 places to the left

• 2 places to the right

Why is the exponent negative when the decimal point is moved to the left?

• Because the number becomes smaller

• Because it indicates a multiplication by 10

• Because the number becomes larger

• Because it indicates a division by 10

What would be the exponent if the decimal point is moved 4 places to the left?

• 10^1

• 10^0

• 10^-4

• 10^4