Shi Fengshou Rapid Calculation

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Shi Fengshou is a mental calculation system developed by Prof. Shi Fengshou.

The basic features of Shi Fengshou Rapid Calculation are as follows:

  • Begins from the higher digits, proceed from left to right.
  • Employs no calculation devices.
  • Follows no fixed procedure.
  • Provides the correct answer directly upon seeing the problem.
  • Can be applied to problems involving addition, subtraction, multiplication, division, roots, trigonometric functions, logarithms, and so forth.