By: Piyali, Anushka, Varun, Suhruth 20 20 Vigesimal 20 20 20 20 By: Piyali, Anushka, Varun, Suhruth

Vigesimal Conversion Chart Decimal Vigesimal 1 2 3 4 5 6 7 8 9 10 A 11 B 12 C 13 D 14 E 15 F 16 G 17 H 18 I 19 J This is a vigesimal conversion chart. It shows base 10 numbers converted into base 20.

Vigesimal Mayan chart The Vigesimal Mayan Chart has over billions of symbols in it, from 0 – 19. Each one is unique in it’s own special way. The Mayans used to carve them on the walls.

Multiplication Vigesimal multiplication answers are very weird. Instead of just writing your answer you do something a little bit different. First you find the actual answer in base 10. Now this is how you convert it into base 20. In the beginning as the first digit you find how many 20s go into the base 10 answer. As the second digit you see how many left over ones there are. If there are no ones left you just put a zero. For example A x B would equal 10 x 11 in base 10. Then we solve it and then it equals 110. 5 20s go into 110 and there are 10 left over. 10 in base 20 is A so the answer is 5A. What is G x 8? Look at the multiplication chart on the next slides.

EXAMPLES Resource: 2G +1H ------- 4B A x B ----- 5A

Vigesimal multiplication chart 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 12 14 16 18 1A 1C 1E 1G 1I 20 11 17 1D 1J 22 25 28 2B 2E 2H 30 24 2C 2G 34 38 3C 3G 40 15 1F 2A 2F 35 3A 3F 45 4A 4F 50 36 3I 44 4G 52 58 5E 60 29 33 3H 4B 4I 55 5C 5J 66 6D 70 48 54 68 6G 74 7C 80 41 4J 5H 6F 7D 82 8B 90 5A 6A 7A 8A 9A A0 61 6C 73 7E 85 8G 97 9I A9 B0 7G 88 9C A4 AG B8 C0 89 92 9F A8 B1 BE C7 D0 9G AA B4 BI CC D6 E0 B5 CF DA E5 F0 CG DC E8 F4 G0 E9 F6 G3 H0 G4 H2 I0 I1 J0 100

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