Q: How is the number 61,515,108 written in Scientific Notation?
A: 6.1515108 x 107
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 61,515,108 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 | . | 1 | 5 | 1 | 5 | 1 | 0 | 8 |
| Decimal Count: | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
There are 7 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 = 6.1515108
b = 7
Now the whole thing:
6.1515108 x 107
Check your work:
107 = 10,000,000 x 6.1515108 = 61,515,108
| 61,515,106 | 61,515,107 | 61,515,109 | 61,515,110 |
| 6.1515106 x 107 | 6.1515107 x 107 | 6.1515109 x 107 | 6.151511 x 107 |