The basic slide rule is suitable for multiplication and division, but not for addition and subtraction, which is the purpose of the "Addiator" on the other side of this unusual model. Generally, they are at least Calculator and slide rule as long, to give greater accuracy, and often have more scales, for more specialised calculations.

It is featured here to illustrate a simple, small, pocket, slide rule. The Otis King cylindrical slide rule has an extremely long scale for improved accuracy in a small physical size. One disadvantage is that the slide rule is oblivious to the placing of the decimal point, which has to be determined separately, often by a quick mental approximation to the answer.

The example in the photograph above has scales marked on the left of the scales "A", "B", "C1", "C", and "D", and has been set to give a multiplier of 2 by sliding the "1" of scale "C" to align with the "2" of scale "D".

A slide rule has scales both on the fixed body and also on the sliding middle section, while s sliding cursor is a useful aid in determining the alignment of the scales.

With practice a slide rule is very quick in use, but the accuracy is dependent on the skill of the user, especially when interpolating answers which lie between the markings on the scales. This can be used with totals up toor, by putting the decimal point two places from the right, currencies up to 9, Slide rule - very widely used, mainly for scientific calculations, before electronic calculators became cheap.

The slide rule featured here is unusual since the reverse side has an "Addiator" type calculator for addition and subtraction. The electronic calculator has the advantages that it provides an answer accurate to 6, 8, or more, decimal places and also puts the decimal point in the correct position.

Made in Hong Kong. Slide Rule Distinctive features: This is a Kingson Four Rule combination pocket slide-rule with an "Addiator" type calculator on the other side.

The result of muliplying, for example, 3 x 2 can be determined by aligning the cursor with the "3" on scale "C" and reading the answer off scale "D", that is 6.Slide Rule Style Calculators & Wheel Calculators that is hand held rotating calculator.

Find great deals on eBay for slide rule calculator. Shop with confidence. Slide Rule Style Calculators are standard reference tools for many industries.

They are simpler to use than conventional slide rules, more convenient than electronic calculators and less expensive than computers and smart phones. Air Duct Calculator -Slide Rule Style. This rectangular air duct calculator is the technicians favorite. Provides the following information with one setting: Friction- Velocity- Round Duct Size- Surface Area and more.

Size: 4" x ".Category: CALCULATORS. Kingson Four-Rule Calculator. Is a Slide-Rule on one side and a 6-decade "Addiator" type calculator on the other side. For use with totals up to , or, by putting the decimal point two places from the right, currenccies up to 9, of results for "slide rule calculator" Midori CL Slide Ruler Clear () by Midori.

$ $ 11 92 Prime. FREE Shipping on eligible orders. Only 2 left in stock - order soon. More Buying Choices. $ (7 new offers) 5 out of 5 stars 1. SuperCool Slide Rule by SuperCool Slide Rule.

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