​10⁴ = 10 x 10 x 10 x 10 =10,000

8 x 10,000 = 80,000​

Some text here about the topic of discussion

We will estimate the population using powers of 10.

​

China's population rounds to 1 billion. Let's write that using powers of 10.

​

​

1 billion =

1,000,000,000​ =

10⁹​

​

​100,000,000 =

10⁸​

​We can also estimate very small quantities

Will this power of 10 have a positive or negative exponent?

​Estimate the thickness of a human hair to

0.0002​

​

0.0002 =

2 x 10^?​

​

0.0002 =

2 x 10^-4

​

​

Compare.

​

2 x 10¹⁵ < 2 x 10¹⁶

​

This shows that the value of the US is one more power of 10...

​

which is 10 times greater than the value of Canada. ​

Now turn to workbook page 56.