Multiplying two two-digit numbers just under 100 can be computed much more simply with two subtractions and a single digit multiplication. Subscribe: http://bit.ly/SubTimRicchuiti | Enable ALL push notifications 🔔 This is a great trick if you participate in UIL Number Sense or are looking for other fast mental math techniques. Follow for more number sense tips. Follow Tim Ricchuiti: TikTok: https://www.tiktok.com/@polymathematic Twitter: https://twitter.com/poly_mathematic Instagram: https://www.instagram.com/polymathematicnet Reddit: https://www.reddit.com/user/polymath-matic Watch more Math Videos: Math Minutes: https://www.youtube.com/playlist?list=PLrc8spN1b3jmVFYwHiuMzCYJ0y_yiwUge Number Sense: https://www.youtube.com/playlist?list=PLrc8spN1b3jksKkY_oarNFEFAHjrIV97U MATHCOUNTS: https://www.youtube.com/playlist?list=PLrc8spN1b3jlqDkZXtby9lnEaOBy7-ZY0