Write 45000 in scientific notation

Step by step

The question

Question: write 45000 in scientific notation.

1 What it looks like

Scientific notation is a number from 1 to under 10, times a power of 10.

2 Move the point

Moving the point 4 to the left made the number 10000 times smaller.

To make it the same again, we times by 10000.

That is 10⁴.

So 45000 is 4.5000 × 10⁴.

Zeros at the end, after the point, can go: 4.5000 is 4.5.

So we get 4.5 × 10⁴.

3 Check

Let's check: times 10000 moves the point 4 back to the right.

We get 45000 again!

Let's look back.

First: what it looks like.

Then: move the point.

Last: check.