What is 999000000 in standard form?

Answer 1

In standard form, 999000000 is written as 9.99 x 10^8. This is because the decimal point is moved 8 places to the left to convert the number to scientific notation, and the exponent indicates the number of places the decimal point was moved.

Answer 2

Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example. You would usually write it with comma separators as: 999,000,000