Q: How is the number 781,208,315 written in Scientific Notation?

 A: 7.81208315 x 108

Why is 781,208,315 written as 7.81208315 x 108 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 781,208,315 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: 781,208,315
  • New Number: 7.81208315

Step 2

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

New Number: 7.81208315
Decimal Count: 12345678

There are 8 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 = 7.81208315

b = 8

Now the whole thing:

7.81208315 x 108

Step 4

Check your work:

108 = 100,000,000 x 7.81208315 = 781,208,315


More Scientific Notation Examples

781,208,313781,208,314781,208,316781,208,317
7.81208313 x 1087.81208314 x 1087.81208316 x 1087.81208317 x 108

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