|
Related articles:
Addition
Multiplication
Division (mathematics)
Numeral system
Mathematics
Sumer
Key terms: abacus beads wire counting blind mathematical tool calculations abaci cm grooves decimal dates taught russian abacus deck zero root frame chinese abacus teaching instrument arithmetic horizontal roman abacus greek abacus beads in each been used abako numeral system elementary poncelet row roman empire each wire gregor vertical line beads on each tens four beads blind students counters beam quipu subtraction multiplication number of days abacus is called representation margarita philosophica Search external links cited by footnotes on Wikipedia page Abacus: |
|