Measurement Examples And Worksheet - A-64 Appendix 5 Page 8
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36A-70
Appendix V Measurement
Self Check 8
8
EXAMPLE
Cooking
If a recipe calls for 3 pints of milk, how many
Convert 2.5 pints to fluid
fluid ounces of milk should be used?
ounces.
Strategy
We will use a two-part multiplication process that converts 3 pints to
Now Try
Problem 55
cups and then converts that result to fluid ounces.
WHY
We must use a two-part process because the table on page A-69 does not
contain a single unit conversion factor that converts from pints to fluid ounces.
Solution
Since there are 2 cups per pint, we can convert 3 pints to cups by multiplying by the
2 c
unit conversion factor
. Since there are 8 fluid ounces per cup, we can convert
1 pt
8 fl oz
that result to fluid ounces by multiplying by the unit conversion factor
.
1 c
3 pt
Write 3 pt as a fraction:
3 pt
.
3 pt
2 c
8 fl oz
1
#
#
3 pt
Multiply by two unit conversion factors:
1
1 pt
1 c
2 c
8 fl oz
1
and
1
.
1 pt
1 c
Remove the common units of pints and cups in
3 pt
2 c
8 fl oz
the numerator and denominator. Notice that all
1
1 pt
1 c
the units are removed except for fluid ounces.
#
#
3
2
8 fl oz
Simplify.
48 fl oz
Multiply.
Since 3 pints is equal to 48 fluid ounces, 48 fluid ounces of milk should be used.
Define units of time.
8
The American system of measurement (and the metric system) uses the units of
second, minute, hour, and day to measure time. These units are related as follows.
Units of Time
1 minute (min)
60 seconds (sec)
1 hour (hr)
60 minutes
1 day
24 hours
The abbreviation for each unit is written within parentheses.
To convert units of time, we use the following unit conversion factors. Each
conversion factor shown below is a form of 1.
Use the unit
Use the unit
To convert
conversion
To convert
conversion
from
factor
from
factor
60 sec
1 min
minutes to seconds
seconds to minutes
1 min
60 sec
60 min
1 hr
hours to minutes
minutes to hours
1 hr
60 min
1 day
24 hr
days to hours
hours to days
1 day
24 hr
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