Q: How is the number 131,515,257 written in Scientific Notation?

 A: 1.31515257 x 108

Why is 131,515,257 written as 1.31515257 x 108 in scientific notation?

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 131,515,257 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

  • Original Number: 131,515,257
  • New Number: 1.31515257

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number: 1.31515257
Decimal Count: 12345678

There are 8 places to the right of the decimal place.

Step 3

Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b

a = 1.31515257

b = 8

Now the whole thing:

1.31515257 x 108

Step 4

Check your work:

108 = 100,000,000 x 1.31515257 = 131,515,257


More Scientific Notation Examples

131,515,255131,515,256131,515,258131,515,259
1.31515255 x 1081.31515256 x 1081.31515258 x 1081.31515259 x 108

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