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 462,885,820 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: | 4 | . | 6 | 2 | 8 | 8 | 5 | 8 | 2 | 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 = 4.6288582 (Please notice any zeroes on the end have been removed)
b = 8
Now the whole thing:
4.6288582 x 108
Check your work:
108 = 100,000,000 x 4.6288582 = 462,885,820
462,885,818 | 462,885,819 | 462,885,821 | 462,885,822 |
4.62885818 x 108 | 4.62885819 x 108 | 4.62885821 x 108 | 4.62885822 x 108 |