MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 2
LESSON 1
ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION
OF FRACTIONS AND DECIMALS; AND CONVERSION OF
FRACTIONS TO DECIMALS AND DECIMALS TO FRACTIONS
TASK 2.
Describe the processes for converting fractions to decimals and
decimals to fractions; and for adding, subtracting, multiplying,
and dividing decimals.
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
Task 1 served to discuss how to solve fractions in connection with machine
shop operations.
In task 2, the processes for converting fractions to
decimals and decimals to fractions, and the addition, subtraction,
multiplication, and division of decimals will be discussed.
2.
General
Decimal fractions are simply common fractions written in a different form.
The purpose of decimal fractions is to make work with fractions easier.
Many tools used in measuring very small dimensions are ruled off in
decimals. In shop work, fractions of 8ths, 16ths, 32nds, and 64ths of an
inch are used in making ordinary measurements. For greater
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