There are lots of ways to represent numbers with different ways having been used through history.

• Stone Age Numbers (Unary)
  • How do you add Baboon bones?
  • Activity: Make your own number out of clay
• Prayer Beads and number representation (unary)
• Egyptian Numerals
  • Symbols for 10s 100s, 1000s ….
  • Activity: Add like an Egyptian
  • Activity: Egyptian Hieroglyph Pixel Puzzle
• Roman Numerals  [CS4FN article]
  • getting complicated with IX etc but still pants at multiplication
  • Activity: Roman Numeral Pixel Picture
• Bakuro (binary)
  • Activity: Binary logical thinking Puzzles
• Chocolate Turing Machines
  • Activity: make and program a Turing Machine to compute with unary and binary

More to come…

More on Computing and History