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Is the math we teach obsolete ?. The revolutions in the mathematics of business have had profound and fundamental effects on math education. The What if Math Slideshow. In the year 1202. King Richard the Lionhearted died 1199. A revolutionary book was published.

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## Is the math we teach obsolete ?

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**Is the math we teach obsolete?**The revolutions in the mathematics of business have had profound and fundamental effects on math education. The What if Math Slideshow**In the year**1202 King Richard the Lionhearted died 1199**It defined the mathematics every student is expected to**master today 2012 is not 1202**Liber abbaci**by Leonardo of Pisa 1202 This virtually unknown work The Book of Calculation**Leonardo joined his trader, diplomat**father in Algeria**Where he was tutored in Arabic arithmetic and algebra**The Compendious Book on Calculation by Completion and Balancing by al Khwarizmi**And used Roman math like all European and Arab merchants did**Its technology was the abacus**Roman multiplication by repetition while slow, cumbersome,**and error prone 167 x 9 =**None of the cities should be allowed to have its own**separate coinage or a system of weights and measures; they should all be required to use ours. Dio Cassius Worked for the Empire**Leonardo’s business math using the new paper technology**Paper making**Was a huge improvement**Algorist vs. abacist**Becoming standardized and more symbolic**A 16th century merchant’s statement of cash flows**Becoming the standard content for business and for schooling**The Chapters in Liber abbaci**In the year**1979 The Blues Brothers**Dan Bricklin, a frustrated**Bob Frankston & Dan Bricklin**Harvard Business**School student**So he invented the spreadsheet**VisiCalc the visible calculator**Mitch Kapor added graphs**VisiPlot 1980**And a database**Mitch and Lotus 123 in 1982**Putting the PC on every desk**The IBM PC**Business no longer uses Leonardo’s math**TK!Solver by Bricklin and Frankston 1982 did not work out as well**What if**เกิดอะไรขึ้นถ้า ماذا لو 만약 如果 Hvad nu hvis Que faire si Cosasuccede se And asking Was ist, wenn ¿Quépasasi quod si Τι θα συμβεί αν どのような場合 מה היה קורה אילו Что делать, если E si Hvaðef**In the year**2012 Mars Rover Curiosity arrived August 2012**Considered outmoded in 1894**The Committee of Ten**What**if… We finally declare Leonardo’s Math Obsolete**What if… students could learn the math of 21st century**business

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