Using the Cranmer abacus for the Blind
Title: Using the Cranmer abacus for the Blind
Details
- Author(s):
- Gissoni, Fred L.
- Recommended ages:
- Unknown
- Language:
- English
- Categories:
- Math ; Math
Description
a textbook that teaches the use of the Cranmer abacus for addition, subtraction, multiplication, and division in simple language
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