MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 2
actually larger than the one given. Likewise, the (-) sign is used to show
that the result is actually less than the one given. In other cases, it may
be advisable to round off a decimal to a given value as described in the
rule below.
Rule 1. In writing the result of a calculation in decimal fractions to a
certain number of places, write the last place as one figure larger if the
next figure to the right is a 5 or larger. Should this figure be less than
5, discard it from the figure.
EXAMPLE
Suppose when solving a problem a result such as 52.56266666 is obtained.
To
write it correctly to three decimal places it is written as 52.563+.
To
write this same number in two decimal places, it is written 52.56+.
12.
Conclusion
This task described the processes for converting fractions to decimals and
decimals to fractions; and adding, subtracting, multiplying, and dividing
decimals for the purpose of helping the machinist to achieve greater
accuracy of measurements involved in his work. Now complete the practical
exercise which is designed to reinforce your learning of the material
presented in the two tasks of this lesson.
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