Designer Stefanie Posavec has turned one her existing art projects — a way to colorfully visualize long, complex multiplication calculations — into a web app that any one can try. Designer Stefanie ...

Most people know just one way to multiply two large numbers by hand. Typically, they learned it in elementary school. They’re often surprised to find that there are a variety of ways to do ...

Practice multiplying by 9 using your fingers and several math games. Explore the Multiply by 9 facts by recognizing there is only one new fact: 9 x 9. Compete against characters to see who finds the ...