Slide rule: percentage, proportion, squares and square roots

United States, 1944

Film
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Using a rule with only “C” and “D” scales, multiplication and division operations are revised. Problems in proportion are solved, using both left and right index. Problems in percentage solved using the proportion method. Use of the rule with “A”, “B”, “C” and “D” scales. Procedures for determining squares and square roots are demonstrated.

Credits

director

F.E. Brooker

production company

Loucks and Norling Studios

Language

English

Duration

00:20:15:00

Colour

Black and White

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