Q: How is the number 25,516,530 written in Scientific Notation?

 A: 2.551653 x 107

Why is 25,516,530 written as 2.551653 x 107 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 25,516,530 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: 25,516,530
  • New Number: 2.5516530

Step 2

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

New Number: 2.5516530
Decimal Count: 1234567

There are 7 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 = 2.551653 (Please notice any zeroes on the end have been removed)

b = 7

Now the whole thing:

2.551653 x 107

Step 4

Check your work:

107 = 10,000,000 x 2.551653 = 25,516,530


More Scientific Notation Examples

25,516,52825,516,52925,516,53125,516,532
2.5516528 x 1072.5516529 x 1072.5516531 x 1072.5516532 x 107

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