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Maths ToK - Number
Intro AoK Mathematics
How do we know.....
1: ... in Number?
2: ... in Geometry
3. ... in Reasoning?
4. ... in Mathematics?
Origins of Number
+
=
When Does History Begin?
How Old Is the Universe? About 15-billion years old - 15,000,000,000
Formation of the Earth
4.5-billion years ago (4,500,000,000) Cosmic Calendar.
If the history of the universe were put on one calendar year:
January 1 - Big Bang
May 1 - Milky Way Galaxy
September 14 - Formation of the Earth. (4.5 Billion Years Ago)
October 2 - Formation of Rocks
November 12 - Oldest Fossil
December 1 - First Significant Oxygen Appear
December 24 - First Dinosaurs
December 28 - Dinosaurs Extinct
December 31, at 10:30 p.m. - First Humans (100,000 Years Ago)
Counting
Aboriginal counting (or saying)
1 mal
2 bularr
3 guliba
4 bularr-bularr
5 bularr-guliba
6 guliba-guliba
Troba Tribe - Paraguay
2 nivoca
4 nalotapegat
8 nivoca-nalotapegat
Writing - numerals
Origin of the word for ZERO
- Hindu: sunya (means empty)
- Arabic: sifr
- Latin: zephirum
- Italian: zero
Place value
Grouping
Why do we group in tens?
Why do we group in tens?
Could we group in other quantities?