Q: How is the number 31,515,333 written in Scientific Notation?
A: 3.1515333 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 31,515,333 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: | 3 | . | 1 | 5 | 1 | 5 | 3 | 3 | 3 |
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 = 3.1515333
b = 7
Now the whole thing:
3.1515333 x 107
Check your work:
107 = 10,000,000 x 3.1515333 = 31,515,333
31,515,331 | 31,515,332 | 31,515,334 | 31,515,335 |
3.1515331 x 107 | 3.1515332 x 107 | 3.1515334 x 107 | 3.1515335 x 107 |