- DINNERS A family bought two large pizzas for
dinner. Some pieces of each pizza were not eaten, as
shown.
a. What fraction of the first pizza was not eaten?
b. What fraction of the second pizza was not
eaten?
c. What fraction of a pizza was left?
d. Could the family have been fed with just one
pizza? - GASOLINE BARRELS Three identical-sized
barrels are shown below. If their contents of the two
of the barrels are poured into the empty third
barrel, what fraction of the third barrel will be
filled? - WEIGHTS AND MEASURES A consumer
protection agency determines the accuracy of
butcher shop scales by placing a known three-
quarter-pound weight on the scale and then
comparing that to the scale’s readout. According to
the illustration, by how much is this scale off? Does
it result in undercharging or overcharging customers
on their meat purchases?
0 1 pound(^3) –
4
pound
weight
(^1) –
2
108.FIGURE DRAWING As an aid in drawing the
human body, artists divide the body into three
parts. Each part is then expressed as a fraction of
the total body height. For example, the torso is
of the body height. What fraction of body height
is the head?
Head
Torso:
––^4
15
(^3) –
5
Below the waist:
4
15
3.4 Adding and Subtracting Fractions 255
fromCampus to Careers
School Guidance Counselor
109.Suppose you work as a
school guidance counselor
at a community college
and your department has
conducted a survey of the
full-time students to learn
more about their study
habits. As part of a Power
Pointpresentation of the
survey results to the
iStockphoto.com/Monkeybusinessimages
school board, you show the following circle
graph. At that time, you are asked, “What
fraction of the full-time students study 2 hours
or more daily?” What would you answer?
2 hr
1 hr
Less than 1 hr
More than 2 hr
––^3
(^102) –
5
(^1) –
5
––^1
10