## Interactive Multiplication

Try out this interactive applet to visualize, explore, and practice multiplication.

Try out this interactive applet to visualize, explore, and practice multiplication.

A huge idea in advanced mathematics is that you can add objects that aren’t numbers. People often don’t learn about this surprising concept until college…

When did you learn that there are still unsolved problems in mathematics?

Do you have a favorite unsolved problem?

For me, it’s a close tie among…