Q: How is the number 25,508,274 written in Scientific Notation?
A: 2.5508274 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 25,508,274 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: | 2 | . | 5 | 5 | 0 | 8 | 2 | 7 | 4 |
| 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 = 2.5508274
b = 7
Now the whole thing:
2.5508274 x 107
Check your work:
107 = 10,000,000 x 2.5508274 = 25,508,274
| 25,508,272 | 25,508,273 | 25,508,275 | 25,508,276 |
| 2.5508272 x 107 | 2.5508273 x 107 | 2.5508275 x 107 | 2.5508276 x 107 |