Ronald W. Doerfler Calculating Without Instruments Reviews Summary
Ratings Breakdown
Rated 4.4 by 27 people
Pros from Reviews
- In-depth content
- Covers logarithms
- Variety of calculation methods
- Explores arithmetical techniques
- Packed with ideas/skills
- Fun read
- Useful for mental calculation
- Increases speed in calculation
Cons from Reviews
- Requires strong algebra skills
- Not for beginners
- Not well proofread
- May be too condensed
Notable Features
No instruments needed
Mathematical techniques
Practical calculations
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