Q: How is the number 64,631,438 written in Scientific Notation?
A: 6.4631438 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 64,631,438 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 | 6 | 3 | 1 | 4 | 3 | 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 = 6.4631438
b = 7
Now the whole thing:
6.4631438 x 107
Check your work:
107 = 10,000,000 x 6.4631438 = 64,631,438
| 64,631,436 | 64,631,437 | 64,631,439 | 64,631,440 |
| 6.4631436 x 107 | 6.4631437 x 107 | 6.4631439 x 107 | 6.463144 x 107 |