Math Tricks / Finger Math / Multiplying by 9 using your fingers
These Mental Tricks Will Have You Multiplying Faster Than Einstein Ever Could! « Mind Hacks ---- Wow, this seems to make some multiplication easier to do.
How To: Hate Math? These Mental Tricks Will Have You Multiplying Faster Than…
math: Fun math trick and a visual representation of multiplication that actually makes sense and goes pretty quickly (aka students don't have to draw 25 groups of
9 times tables - fold down finger that you are multiplying 9 by