Numerals
The signs we write numbers with. Tally marks need one mark per thing; Roman numerals add up signs for groups; the ten Hindu-Arabic numerals 0 to 9, invented in India, write any number in a few signs.
Depth 1 · Foundation
You can read tallies and simple Roman numerals, and know the ten numerals we use came from India through the Persian and Arab world.
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- 1
Foundation
You can read tallies and simple Roman numerals, and know the ten numerals we use came from India through the Persian and Arab world.
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What's still between you and Numerals, depth 1, in the order you can learn it.