Multiplication of two numbers is easy, right? At primary school we learn how to do long multiplication like this: Methods similar to this go back thousands of years, at least to the ancient Sumerians ...

(bright music) - [Children] Math Mights. - Welcome, third grade Math Mights. I'm so excited you joined us today. My name is Ms. Askew, and I can't wait to have fun learning about math with you today.