Index Notation - Powers of 10
https://www.mathsisfun.com/index-notation-powers.html
"Powers of 10" is a very useful way of writing down large or small numbers. Instead of having lots of zeros, you show how many powers of 10 will make that many zeros. Example: 5,000 = 5 × 1,000 = 5 × 10 3. 5 thousand is 5 times a thousand. And a thousand is 10 3.
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