Transcript Document

Good Afternoon!
Today we will be learning about
Customary units of weight
Let’s warm up :
Write <, > or = :
1) 7 fluid ounces (fl. oz)
2) 3 cups (c)
1 pint (pt)
3) 2 pints (pt)
4)
2 cup (c)
9 quarts (qt)
2 quart (qt)
2 gallon (gal)
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Let’s review what we did in the previous chapter
CAPACITY: It is a measure of a dry or liquid volume of a container.
Like, we can say that:
A cup of juice is equal to 8 ounces of fluid.
An ounces (fl. oz.) is used to measure capacity in
the customary system.
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Review

The container has a capacity of 1 gallon.
 A coke drink is about 12 fluid ounces.
 A regular cup of coffee is about one cup.
 A can of oil for the car is about one quart.
 A large milk container is about a gallon.
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Review
When measuring capacity in the customary
system the common units used are Ounces, cup,
pint, quart, and gallon.
From smallest to greatest capacity measurements are compared as:
Ounces, cup, pint, quart, and gallon.
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Review
Customary Units use to measure the capacity are:
Customary Units of Capacity
8 fluid ounces (fl. oz) = 1 cup (c)
2 cups (c) = 1 pint (pt)
2 pints (pt) = 1 quart (qt)
4 quarts (qt) = 1 gallon (gal)
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Today we will learn about the
Customary units of measure for weight.
WEIGHT: It is a customary measurement that
tells how heavy an object is.
Like, we can say that:
The dog’s weight is equal to 12 pounds.
An ounces (oz) is used to measure weight in the
customary system.
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History
The Babylonians' unit of weight was the ka and the GUR.
The GUR equaled to about 80 gallons. These were the
earliest known units given for weight.
The Hebrews' units were the bat, log, and the hin. Like
the customary system, the Hebrews had units to
measure both dry and wet substances.
The Roman system developed the pinte to
measure liquid and the quart to measure dry
substances.
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 The cat’s weight is 9 pounds.
 A strawberry’s weight is 1 ounce (oz).
 A pineapple’s weight is 1 pound (lb).
 A car’s weight is 1 ton (T).
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When measuring capacity in the customary system
the common units used are Ounces, pound , and ton
.
From smallest to greatest capacity measurements are compared as:
Ounces, pound and ton .
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Customary Units use to measure the weight are:
Customary Units of Weight
16 ounces (oz) = 1 pound (lb)
2,000 pounds (lb) = 1 ton (T)
When converting any unit of measurements if you want:
To change to a larger unit, divide.
To change to a smaller unit, multiply.
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Reading a Scale
Scales show weight in pounds and fractions
of a pound which include:
halves, fourths, eighths, and sixteenths.
 Reading a scale marked with
pounds and fractions of a pound is
similar to reading a ruler.
 The only difference is that a scale
has the geometric shape of a circle.
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 When reading the scale, find the
nearest whole pound before the arrow
shown on the scale.
 Then find the fraction of a pound
that the arrow is pointing to.
 The total amount is read as a
fraction if it is under a pound,
exactly a pound, or a mixed fraction
if it is over a pound.
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A shows 9 pound.
16
B shows 1 pound.
C shows 1 3 pounds.
4
D shows 2 1 pounds.
2
E shows 3 1 pounds.
16
F shows 3 5 pounds.
8
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Which is more reasonable for the weight of a bag
of oranges – 1 pound or 1 ounce?
A bag of oranges is too large to weigh an
ounce. An ounce would be the weight of
something very light. So, measuring in
terms of pound would be more
appropriate.
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BREAK
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Assignment
What unit would you use to measure the weight
for each?
1)
A math book.
2)
An elephant.
3)
A paper napkin.
4)
A bag of apples.
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5) What is the smallest unit to measure the weight?
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6) What is the largest unit to measure the capacity?
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Write <, > or = :
7 ) 15 ounces (oz)
1 pound (lb)
8) 3,000 pounds (lb)
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1 ton (T)
20
Fill in the blanks:
9) To change to a larger unit, _______.
10) To change to a smaller unit, _______.
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Very Good!
Let's Review
WEIGHT: It is a customary measurement that tells
how heavy an object is.
Like, we can say that:
The dog’s weight is equal to 12 pounds.
An ounces (oz) is used to measure weight in the customary system.
 The cat’s weight is 9 pounds.
 A strawberry’s weight is 1 ounce (oz).
 A pineapple’s weight is 1 pound (lb).
 A car’s weight is 1 ton (T).
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Review
When measuring capacity in the customary system the
common units used are Ounces, pound , and ton .
From smallest to greatest capacity measurements are compared as:
Ounces, pound and ton .
Customary Units use to measure the weight are:
Customary Units of Weight
16 ounces (oz) = 1 pound (lb)
2,000 pounds (lb) = 1 ton (T)
When converting any unit of measurements if you want:
To change to a larger unit, divide.
To change to a smaller unit, multiply.
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Review
Reading a Scale
 When reading the scale, find the
nearest whole pound before the arrow
shown on the scale.
 Then find the fraction of a pound
that the arrow is pointing to.
 The total amount is read as a
fraction if it is under a pound,
exactly a pound, or a mixed fraction
if it is over a pound.
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Review
A shows 9 pound.
16
B shows 1 pound.
C shows 1 3 pounds.
4
D shows 2 1 pounds.
2
E shows 3 1 pounds.
16
F shows 3 5 pounds.
8
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You have done a nice job.
See you in the next session.
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