Video# Multiplying challenging decimals (Full video)

## Supporting grades: 6

Khan Academy

Description: Sometimes multiplying really small decimals (with all those zeros!) can be a little intimidating. Watch as we show you a handy trick to simplify these problems and solve them. Created by Sal Khan. Let's multiply 1.21, or 1 and 21 hundredths, times 43 thousandths, or 0.043. So let's just think about a very similar problem but one where essentially we don't write the decimals. Let's just think about multiplying 121 times 43, which we know how to do.

You must log inorsign upif you want to:*

*Teacher Advisor is 100% free.