ch. 3. History : much ado about less than nothing
The search for evident meaning
ch. 4. History : meaningful and meaningless expressions
ch. 5. History : making racially new mathematics
From hindsight to creativity
ch. 6. Math is rather flexible
Sometimes -1 is greater than zero
Traditional complications
Can minus times minus be minus?
ch. 7. Making a meaningful math
Designing numbers and operations