لهذه المسطرة الحاسبة اوضاع لقيم مختلفة: من مقياس C إلى مقياس D (مضروب 2). من مقياس D إلى مقياس C (مقسوم على 2). المقاييس A و B (للضرب والقسمة على 4). A و D المقاييس (المربعات والجذور التربيعية).
^pp. 80–87. "The difficulty of learning to use slide rules discouraged their use among the hoi polloi. Yes, the occasional grocery store manager figured discounts on a slipstick, and this author once caught his high school English teacher calculating stats for trifecta horse-race winners on a slide rule during study hall. But slide rules never made it into daily life because you could not do simple addition and subtraction with them, not to mention the difficulty of keeping track of the decimal point. Slide rules remained tools for techies." نسخة محفوظة 04 مارس 2016 على موقع واي باك مشين.
