MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 1
LESSON 1
ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION
OF FRACTIONS AND DECIMALS; AND CONVERSION OF
FRACTIONS TO DECIMALS AND DECIMALS TO FRACTIONS
TASK 1.
Describe the processes for adding, subtracting, multiplying, and
dividing fractions.
CONDITIONS
Within a self-study
environment
and
given
the
subcourse
text,
without
assistance.
STANDARDS
Within two hours
REFERENCES
No supplementary references are needed for this task.
1.
Introduction
The service section of a ground equipment maintenance support company
organization contains a machine shop for support of the company's repair
shop elements and supported units.
This support consists of refurbishing
repair parts, and designing and fabricating jigs, fixtures, and special
tools, through the use of a lathe, shaper, and/or milling machine.
Such
machines provide machine shop personnel with the capability for fabricating
component parts with the correct dimensions and with tolerances down to
thousands of an inch clearance between moving parts, allowing their
efficient operation.
Determining these dimensions and close tolerances, requires the performance
of certain mathematical calculations involving a knowledge of how to solve
fractions.
Subsequent paragraphs, therefore, describe the processes
involved in adding, subtracting, multiplying, and dividing fractions.
Before delving into fractions, a review of the
1
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