Zero
The number of things when there is nothing there. Adding or taking away zero changes nothing, and a number take away itself is zero. Brahmagupta, in India in 628, first wrote rules for zero as a number.
Depth 1 · Foundation
You know zero is the number for nothing, its rules for adding and taking away, and that treating nothing as a number was an Indian invention.
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- 1
Foundation
You know zero is the number for nothing, its rules for adding and taking away, and that treating nothing as a number was an Indian invention.
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What's still between you and Zero, depth 1, in the order you can learn it.