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Soroban or 9 bead abacus

ForfatterJames Monaghan
Emne:Addition, Aritmetik, Aritmetiske operationer
Soroban or 9 bead abacus.
Modified copy of Jerzy Mil's soroban.

Nye Materialer

  • Fourier Lissajous (Mechanical)
  • Pathway to Proof: Triangle Angles
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  • רישום חופשי
  • Conway Circle Theorem

Opdag Ressourcer

  • Graphs of Exponential Function y = k a^x
  • Transforming Graphs
  • Limit as n-> infinity of (1+1/n)^n
  • Untitled
  • Sine and Cosine Functions
  • Arithmetic Calculation Game (working backwards)

Udforsk emner

  • Pythagoras or Pythagoræiske sætning
  • Ligninger
  • Subtraktion
  • Rektangel
  • Kegle
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