Transcript Parts of a Set - Teacher Pages

Fractions of Sets
By Mr. Bales
Objective
• By the end of this lesson, you will be able
to identify, read, write, and model
fractions for parts of a set.
• Standard 4NS1.5 - Students will
explain different interpretations of
fractions, for example…parts of a set, and
division of whole numbers by whole
numbers.
Introduce
• If you had twenty
pennies, and I asked
you to show 1/2 of
the pennies, how
many pennies would
that be?
Introduce
• Let’s practice using fractions in our class.
• Everyone wearing pants head to the back of the
room on the tile.
• What is the fraction of students wearing pants?
(remember the number for what you are looking for
goes on top of the fraction, and the total number of
students goes on the bottom of the fraction)
• Let’s try the same thing, but this time let’s look at all
those that have short sleeves.
• What fraction of the group is wearing short sleeves?
Example
• Before we practice together,
let’s have Mrs. Verughese show
us an example of how to find a
fraction of a set!!
• Mrs. Verughese!!
• Now a Game!!
Let’s Practice Making
Fractions of a Set
• In the middle of your
table you will find a bunch
of cubes. Please take out
12 cubes and place on
your desk.
• Next, count out 1/3 of
those cubes.
• **Note - The whole is 12
cubes, not one cube.
• Divide the cubes into
three equal groups, or
three “fair shares”.
Sharing
• Natalie, how much is the whole?
• The cubes in each group represent what
fraction of all the cubes?
• How many cubes are in each group?
• How much is 1/3 of 12 cubes?
• * One way to find 1/3 of 12 is to first divide the
cubes into three equal groups. Then, you want
only 1 of those groups. How many is in that
group?
•4
More Practice
• Now using only 8
cubes instead of 12
show the following:
• 1/4 of 8
• 1/2 of 8
• 3/4 of 8
• 6/8 of 8
• Now using 14 cubes
show the following:
•
•
•
•
1/7 of 14
3/7 of 14
5/7 of 14
14/14 of 14
Bales Bucks
•
•
•
•
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How much is:
1/4 of 32 cents
1/5 of 30 cents
2/3 of 27 cents
2/4 of 32 cents
2/5 of 30 cents
•
•
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•
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5/6 of 30 cents
3/4 of 32 cents
4/5 of 30 cents
3/8 of 40 cents
6/7 of 42 cents
4/5 of 50 cents
Now Let’s Combine
Generalizations with Fractions
Time to Move!!
Assignment
• Page 512 - #’s 8 - 17
• Get them all correct - No Math
Homework