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 641,377,700 is written in scientific notation.
To find a, take the number and move a decimal place to the right one position.
Now, to find b, count how many places to the right of the decimal.
New Number: | 6 | . | 4 | 1 | 3 | 7 | 7 | 7 | 0 | 0 |
Decimal Count: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
There are 8 places to the right of the decimal place.
Building upon what we know above, we can now reconstruct the number into scientific notation.
Remember, the notation is: a x 10b
a = 6.413777 (Please notice any zeroes on the end have been removed)
b = 8
Now the whole thing:
6.413777 x 108
Check your work:
108 = 100,000,000 x 6.413777 = 641,377,700
641,377,698 | 641,377,699 | 641,377,701 | 641,377,702 |
6.41377698 x 108 | 6.41377699 x 108 | 6.41377701 x 108 | 6.41377702 x 108 |