This worksheet provides examples and exercises to help students understand set intersection and union. It contains examples calculating the intersection and union of various sets by listing their elements. The conclusion is that the intersection of two sets contains the elements that are common to both sets, while the union of two sets contains all elements that are in either set.

1. WORKSHEET
2011-2012
Intersection and Union
Learning Objectives:
By discussions, students are able to:
1.Understanding the definition about intersection
2.Determine the intersection of sets
3.Understanding the definition about union
4.Determine the union of sets
Group Name:
1................................................
2...............................................
3...............................................

2. Set A
Apple Pear Strawberry Kiwi Banana
Set B
Orange Apple Kiwi Avocado Mango
Set C
Asparagus Brocoli Tomato Cauliflower
Set D
Kangkoong Cabbage Mustard
Is there element of
set A and set B
which same? If yes,
write the elements!
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Is there element of
set C and set D
which same? If yes,
write the elements!

3. .............................................................
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CONCLUSION:
Intersection of two set is...................................................
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From all the quetions you
have answered. What can
you conclude?
Let: A = {1, 2, 3, 4, 5}; B = {3, 5}
Is there element of set A
and set B which same? If
yes, write the elements!
Let:
E = {Even natural numbers which are less than 10};
F = { Odd natural numbers which are less than 10}
Is there element of set E and set F which
same? If yes, data the elements!

4. Set X
Dog Rabbit Chiken lizard
Set Y
Bird Duck Cat
Set P
Daisy Flowers Sunflowers Lotus Rose
Set Q
Sunflowers Rose Tulip Jasmines
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Combine all the
elements of X and Y?
Combine all the
elements of P and Q?

5. EXERCISES
1. If K = set of natural numbers not greater than 7 and
L = set odd natural numbers not greater than 7
Determine K  L by listing its members!
2. Let A = { 1, 2, 3, 4, 5}
B = {3, 5, 6, 7}
Determine K  L by listing its members!
3. Let M = set of prime numbers between 1 and 10
N = set of square numbers between 1 and 10
Determine M  N by listing its members!
Determine M  N by listing its members!
CONCLUSION:
Union of two set is.................................................................
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From all the quetions you
have answered. What can
you conclude?
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6. ASSIGNMENT
1. Given:
K = set of square numbers less than 50
L = set of multiples of 4 less than 50
M = set of multiples of 5 less than 50
By all the elements, find:
a. K  L
b. K  M
c. L  M
2. Given:
A = {x x ≤ 5, x is a natural number}
B = {x 3 < x < 8, x is a natural number}
C = {x 5 ≤ x ≤ 10, x is a natural number}
By listing the elements, determine:
a. A  B
b. A  C
c. B  C