Q: How is the number 121,621 written in Scientific Notation?

 A: 1.21621 x 105

Why is 121,621 written as 1.21621 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 121,621 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: 121,621
  • New Number: 1.21621

Step 2

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

New Number: 1.21621
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 = 1.21621

b = 5

Now the whole thing:

1.21621 x 105

Step 4

Check your work:

105 = 100,000 x 1.21621 = 121,621


More Scientific Notation Examples

121,619121,620121,622121,623
1.21619 x 1051.2162 x 1051.21622 x 1051.21623 x 105

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