Measuring In Customary Units Worksheet
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Measuring in Customary Units
Now
B E F O R E
W H Y ?
You measured and estimated
You’ll measure and estimate
So you can estimate the weight of
using metric units.
using customary units.
an elephant, as in Ex. 22.
The units of measurement for length, weight, and capacity commonly
used in the United States are part of the
U.S. customary system
.
Word Watch
U.S. customary system,
Length
The
inch (in.)
is a unit of length in the customary system.
p. 230
Three other customary units of length are the
foot (ft)
,
yard (yd)
,
length: inch, foot, yard,
and
mile (mi)
. You can use the following benchmarks to estimate length.
mile, p. 230
weight: ounce, pound, ton,
1 inch
1 foot
1 yard
p. 231
capacity: fluid ounce, cup,
length of a
distance from
width of a door
pint, quart, gallon, p. 232
small paper clip
shoulder to elbow
1 mile combined length of 15 football fields
1
Using Customary Units of Length
E X A M P L E
To estimate the length of a barrette, think of small paper clips laid next to
it. Then measure the barrette with a ruler to check your estimate.
1
About 1
paper clips fit
The ruler shows sixteenths
2
alongside the barrette, so
of an inch, so the barrette is
1
1
4
7
it is about 1
inches long.
1
, or 1
, inches long.
2
1
6
8
230
Chapter 5
Fraction Operations
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