Q: How is the number 212,800 written in Scientific Notation?

 A: 2.128 x 105

Why is 212,800 written as 2.128 x 105 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 212,800 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: 212,800
  • New Number: 2.12800

Step 2

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

New Number: 2.12800
Decimal Count: 12345

There are 5 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 = 2.128 (Please notice any zeroes on the end have been removed)

b = 5

Now the whole thing:

2.128 x 105

Step 4

Check your work:

105 = 100,000 x 2.128 = 212,800


More Scientific Notation Examples

212,798212,799212,801212,802
2.12798 x 1052.12799 x 1052.12801 x 1052.12802 x 105

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