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Secrets of Mental Math (2011)
Quick: What's 25 × 45? How about 742 × 300? Or 4821 ÷ 9?Most of us, when faced with math problems like these, immediately reach for a calculator or a pen. But imagine if you could perform these and other seemingly difficult—but surprisingly easy—calculations right in your head. Seems like an impossible feat? It's not.
Network: The Great Courses
Runtime: 404 min.
Episode Runtime: 42 min.
Released: Jan. 15, 2011
Status: Ended
Certification: NR
