Q: How is the number 78,858 written in Scientific Notation?

 A: 7.8858 x 104

Why is 78,858 written as 7.8858 x 104 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 78,858 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: 78,858
  • New Number: 7.8858

Step 2

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

New Number: 7.8858
Decimal Count: 1234

There are 4 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 = 7.8858

b = 4

Now the whole thing:

7.8858 x 104

Step 4

Check your work:

104 = 10,000 x 7.8858 = 78,858


More Scientific Notation Examples

78,85678,85778,85978,860
7.8856 x 1047.8857 x 1047.8859 x 1047.886 x 104

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