Q: How is the number 81,485,800 written in Scientific Notation?

 A: 8.14858 x 107

Why is 81,485,800 written as 8.14858 x 107 in scientific notation?

The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

Calculating scientific notation for a positive integer is simple, as it always follows this notation:

a x 10b

Follow the steps below to see how 81,485,800 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

  • Original Number: 81,485,800
  • New Number: 8.1485800

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number: 8.1485800
Decimal Count: 1234567

There are 7 places to the right of the decimal place.

Step 3

Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b

a = 8.14858 (Please notice any zeroes on the end have been removed)

b = 7

Now the whole thing:

8.14858 x 107

Step 4

Check your work:

107 = 10,000,000 x 8.14858 = 81,485,800


More Scientific Notation Examples

81,485,79881,485,79981,485,80181,485,802
8.1485798 x 1078.1485799 x 1078.1485801 x 1078.1485802 x 107

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