MACHINE SHOP CALCULATION - OD1640 - LESSON 1/TASK 1
Multiply 5/8 by 2/5..
Time can be saved here by cancellation.
Shop Work Problems.
In shop work, problems are met frequently that
are condensed to written work looking something like this: 25 2/5 x 6 1/3,
or 47 x 16 4/5.
Rule 1. To multiply two numbers, one or both of which are mixed numbers,
whole number by the denominator, and adding the numerator, as shown below.
Then multiply, as in multiplying two fractions.
Multiply 2 2/7 by 5 1/4.
2 2/7 = 16/6
5 1/4 = 21/4
When one number is a mixed number and the other a
whole number, work as follows: