Write 81000000 in scientific notation

Step by step

The question

Question: write 81000000 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 7 to the left made the number 10000000 times smaller.

To make it the same again, we times by 10000000.

That is 10⁷.

So 81000000 is 8.1000000 × 10⁷.

Zeros at the end, after the point, can go: 8.1000000 is 8.1.

So we get 8.1 × 10⁷.

3 Check

Let's check: times 10000000 moves the point 7 back to the right.

We get 81000000 again!

Let's look back.

First: what it looks like.

Then: move the point.

Last: check.