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

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