Ch 1'8 Multiplication and Division of Fractions

1
Ch 1.8 Multiplication and Division of Fractions
2
To multiply fractions, multiply the numerators,
multiply the denominators and simplify the answer.
3
When multiplying fractions, it is common to
reduce any numerators with any denominators
before multiplying, this is referred to as
canceling.
1
1
3
2
4
When multiplying mixed numbers, change to
improper fractions and multiply.
2
1
5
To divide fractions, multiply the first fraction
by the reciprocal of the second.
6
Divide
1
2
7
Divide
8
Perform the operations
1
11
2
1
9
A barrel has a capacity of 56 gallons. How many
gallons does it contain when it is ¾ full?
10
Two strips of metal are riveted together in a
straight line, with nine rivets equally spaced 3¾
in apart. What is the distance between the first
and last rivet?
11
A welder has 6¾ ft of ½-in pipe. How many pieces
of pipe each 1¾ ft in length can be obtained from
the original pipe?
12
A total of 19 ceiling outlets are to be equally
spaced in a straight line between 2 points that
130½ ft apart in a hallway. How far apart will
the outlets be center to center? (Outlets will
begin and end with the 2 points.)
13
To give 1 grain of digitalis from 1½ grain
tablets, how many tablets should be given?