# Q: How is the number 251,343 written in Scientific Notation?

A: 2.51343 x 105

## Why is 251,343 written as 2.51343 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 251,343 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: 251,343
• New Number: 2.51343

### Step 2

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

 New Number: 2 . 5 1 3 4 3 Decimal Count: 1 2 3 4 5

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 = 2.51343

b = 5

Now the whole thing:

2.51343 x 105

### Step 4

105 = 100,000 x 2.51343 = 251,343

### More Scientific Notation Examples

 251,341 251,342 251,344 251,345 2.51341 x 105 2.51342 x 105 2.51344 x 105 2.51345 x 105

### Explore more about the number 251,343:

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