02 – Mental Math Secrets! – Rapidly Calculate Restaurant Tips (Math Trick) is interesting because math is easy and funny, make we laugh and clever in same time. In this chapter we will learn a little bit about 02 – Mental Math Secrets! – Rapidly Calculate Restaurant Tips (Math Trick)
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Learn to Rapidly Calculate 10%, 15%, and 20% tips at restaurants!
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This video has been watched 83K views since Published on May 13, 2010 until 09-02-2018 06:36:05 and still continue. Duration 9:46 minutes.