Math 0305 Week #13 Notes
Section 7.1:
US System of Measurement
Measurement of length
1 inch
(in)
1 foot
(ft)
1 yard
(yd)
1 mile
(mi)
X4
The height of a
stamp
The length of an
average adult
foot
The width of a
classroom door
The distance four
times around a
track
1 ft = 12 in
1 yd = 3 ft = 36 in
1 mi = 5280 ft
Measurements of weight
1 ounce
(oz)
1 pound
(lb)
1 ton
(T)
The weight of five
quarters
A weight of a package
of four sticks of butter.
The weight of smart car
with two adults
1 lb = 16 oz
1 T = 2000 lb
Measurements of capacity
1 fluid
ounce
(fl oz)
1 cup
(c)
1 pint
(pt)
1 quart
(qt)
1 gallon
(gal)
The amount
of liquid two
tablespoons
can hold
The amount
of coffee in a
short cup at
starbucks
The amount
of coffee is a
grande cup
at starbucks
What a
medium size
container of
ice cream
holds
What a large
jug of
chocolate
milk can hold
1 c = 8 fl oz
1 pt = 2 c
1 qt = 2 pt = 4 c
1 gal = 4 qt
To convert from one unit to another unit, we will use unit conversion
factors. To form a unit conversion factor, we start with a conversion fact
(i.e., 1 ft = 12 in) and divide both sides by the value on one side of the
conversion fact. If we use 1 ft = 12 in, we can divide both sides by 12 in to
get:
1 ft = 12 in
12 in 12 in
1ft
=1
12in
Notice that
1ft
12in
is the same as one, so if we needed to convert 48 in into ft,
we can multiply 48 in by this unit conversion factor. It does not change the
value of €
48 in since we are multiply by a form of one:
48in
• 1ft = 48in • 1ft = 48 ft = 4 ft.
48 in = 48 in • 1 =
€
12in
1
€
€
€
€
12in
1
€
12