Transcript 6th_MA_NS_2.4_REDUCE_FRACTIONS_DW

Name ___________________________
Learning Objective
Today, we will reduce fractions.
CFU
What are we going to do today?
Activate (or provide) Prior Knowledge
A factor is a number that divides a given number evenly.
The greatest common factor (GCF) of two numbers is the
largest number that divides both numbers evenly.
Factors of 6
1, 2, 3, 6
List the factors of the following numbers.
A. The factors of 18
1, 2 , 3, 6, 9, 18
B. The factors of 12
1, 2 , 3, 4, 6, 12
C. What is the GCF of 12 and 18?
6
The GCF of 12 and 18 is ________.
CFU
Students, you already know how to find the GCF of two numbers by listing their factors. Today, we will reduce fractions by finding the GCF
of the numerator and denominator.
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6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Concept Development
The reduced form of a fraction is when the numerator and denominator have no common1 factor except 1.
• A fraction in reduced form is also referred2 to as in simplest form or lowest terms.
To reduce a fraction means to change it into reduced form.
• To reduce a fraction, divide the numerator and denominator by the GCF.
1
2
same
called
NOT a Reduced Fraction
12
18
Reduced Fraction
1, 2, 3, 4, 6, 12
2
3
1, 2, 3, 6, 9, 18
1, 2, 3 and 6 are common factors
1, 2
12
18
1, 3
No common factor except 1
2
3
12
Example: Reduce 18 using the greatest common factor (GCF):
Factors of 12 = 1, 2, 3, 4, 6, and 12
Factors of 18 = 1, 2, 3, 6, 9, and 18
GCF = 6
12  6
2
=
18  6
3
CFU
Use the list of factors to determine which fraction is in reduced form? How do you know? Why is
the other not in reduced form?
A
7
21
1, 7
1, 3, 7, 21
B
9
25
1, 3, 9
1, 5, 25
What number will we need to divide by to reduce the fraction (A) above? How do you know?
A 7
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Flashcards
Reduced Form
B 3
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Skill Development/Guided Practice
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12
1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify3 the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret4 the reduced fraction. “The reduced form of ____ is _____.”
3
find
1.
4
2
3
No common
factor except 1
explain
1, 7
Factors of 7: _______________________
1 , 3 , 7, 21
7  7 1 Factors of 21: ______________________
=
21  7 3 GCF:_______
7
3.
Reduced Fraction
1 , 3, 9
Factors of 9: _______________________
9  3 3 Factors of 12: ______________________
1 , 2 , 3, 4, 6, 12
=
12  3 4
3
GCF:_______
CFU
(#2) How did I/you identify the GCF?
(#3) How did I/you reduce the fraction?
(#4) How did I/you interpret the reduced fraction?
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2.
1, 5
Factors of 5: _______________________
1 , 2 , 4, 5, 10, 20
Factors of 20: ______________________
5 5 1
=
5
20  5 4 GCF:_______
4.
1 , 2 , 3, 4, 6, 12
Factors of 12: ______________________
12  3 4 Factors of 15: ______________________
1, 3 , 5, 15
=
15  3 5
3
GCF:_______
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Skill Development/Guided Practice (continued)
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12
1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
5.
18  6 3
=
42  6 7
Reduced Fraction
2
3
No common
factor except 1
1 , 2 , 3, 6, 9, 18
Factors of 18: _______________________
1 , 2 , 3, 6, 7, 14, 21, 42
Factors of 42: _______________________
GCF:_______
6
6.
24  8 3
=
40  8 5
1 , 2 , 3, 4, 6, 8, 12, 24
Factors of 24: _______________________
1 , 2 , 4, 5, 8, 10, 20, 40
Factors of 40: _______________________
GCF:_______
8
CFU
(#2) How did I/you identify the GCF?
(#3) How did I/you reduce the fraction?
(#4) How did I/you interpret the reduced fraction?
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6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Relevance
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
1. Reducing fractions will make calculations easier.
A pizza is cut into 12 equal
pieces. John and his friend
ate 6 slices. How much of
the pizza did they eat?
6 6
1
=
12  6
2
They ate half of the pizza.
2. Reducing fractions will help you do well on tests.
CFU
Does anyone else have another reason why it is relevant to reduce fractions? (pair-share) Why is it relevant to reduce fractions? You may
give me my reason or one of your own. Which reason is more relevant to you? Why?
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6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Skill Closure
Reduce fractions.
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
1.
Factors of 3:
3 3 1
=
15  3 5
_______________________
1, 3
1, 3 , 5, 15
Factors of 15: _______________________
3
GCF:_______
2.
NOT a Reduced
Fraction
12
18
1, 2, 3, and 6 are common
factor of 12 and 18
Reduced Fraction
2
3
No common
factor except 1
1 , 2 , 7, 14
Factors of 14: _______________________
14  2 7
=
18  2 9
1 , 2 , 3, 6, 9, 18
Factors of 18: _______________________
GCF:_______
2
Constructed Response Closure
Alicia reduced the fraction
12 to 2 . Explain why her answer is not fully reduced.
24
4
______________________________________________________________________________________________________
Summary Closure
What did you learn today about reducing fractions?
Day 1 __________________________________________________________________________________________________
_______________________________________________________________________________________________________
Day 2 __________________________________________________________________________________________________
_______________________________________________________________________________________________________
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6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Name ________________________________
Independent Practice
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12 1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
1.
Factors of 11:
1_______________________
, 11
11  11 1 Factors of 33: ______________________
1 , 3 , 11, 33
=
33  11 3
GCF:_______
11
1 , 3 , 5 , 15
_______________________
3.
Factors of 15:
15  3 5
=
24  3 8
1 , 2 , 3, 4, 6, 8 , 12, 24
Factors of 24: ______________________
5.
Factors of 14:
14  2 7
=
48  2 24
Factors of 48: 1______________________
, 2 , 3, 4, 6, 8 , 12, 16 , 24,
3
GCF:_______
2
GCF:_______
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1 , 2 , 7, 14
_______________________
48
Reduced Fraction
2
3
No common
factor except 1
1_______________________
,5
2.
Factors of 5:
5 5 1
=
35  5 7
1 , 5 , 7, 35
Factors of 35: ______________________
4.
Factors of 27:
27  3 9
=
30  3 10
1, 2 , 3, 5 , 6 , 10, 15, 30
Factors of 30: ______________________
6.
Factors of 12:
12  6 2
=
54  6 9
GCF:_______
5
1 , 3, 9, 27
_______________________
3
GCF:_______
1
, 2 , 3, 4, 6, 12
_______________________
1 , 2 , 3, 6, 9, 18, 27, 54
Factors of 54: ______________________
6
GCF:_______
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Name ________________________________
Periodic Review 1
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12 1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
1.
14
42
14  14 1
=
42  14 3
Factors of 14:
_______________________
1, 2, 7, 14
Factors of 42: ______________________
1, 2, 3, 6, 7, 14, 21, 42
14
GCF:_______
1, 3, 5, 15
_______________________
Factors of 15:
15
75
1, 3, 5, 15, 25, 75
Factors of 75: ______________________
15  15 1
=
75  15 5
15
GCF:_______
1, 2, 4, 8, 16
_______________________
5.
Factors of 16:
16
56
16  8 2
=
56  8 7
1, 2, 4, 7, 8, 14, 28, 56
Factors of 56: ______________________
8
GCF:_______
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2
3
No common
factor except 1
1,
2, 11, 22
_______________________
2.
Factors of 22:
22
33
1, 3, 11, 33
Factors of 33: ______________________
22  11 2
=
33  11 3
3.
Reduced Fraction
4.
11
GCF:_______
Factors of 12:
12
60
12  12 1
=
60  12 5
1, 12, 2, 6, 3, 4
_______________________
Factors of 60: ______________________
1, 2, 3, 4, 5, 6, 10, 12, 15,
12
GCF:_______
20, 30, 60
1, 2, 3, 4, 5, 8, 10, 20, 40
_______________________
6.
Factors of 40:
40
55
1, 5, 11, 55
Factors of 55: ______________________
40  5 8
=
55  5 11
5
GCF:_______
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Name ________________________________
Periodic Review 2
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12 1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
1.
8
32
88 1
=
32  8 4
Factors of 8:
1, 2, 4, 8
_______________________
1, 2, 4, 8, 16, 32
Factors of 32: ______________________
GCF:_______
8
1,
2, 4, 8, 16, 32, 64
_______________________
3.
Factors of 64:
64
88
1, 2, 4, 8, 11, 22, 44, 88
Factors of 88: ______________________
64  8 8
=
88  8 11
8
GCF:_______
1, 2, 4, 7, 14, 28
_______________________
Factors of 28:
28
42
1, 2, 3, 6, 7, 14, 21, 42
Factors of 42: ______________________
28  14 2
=
42  14 3
14
GCF:_______
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2
3
No common
factor except 1
2, 4, 8, 16
Factors of 16: 1,_______________________
2.
16
36
16  4 4
=
36  4 9
1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 36: ______________________
4
GCF:_______
4.
Factors of 36: 1,_______________________
2, 3, 4, 6, 9, 12, 18, 36
36
81
1, 3, 9, 27, 81
Factors of 81: ______________________
36  9 4
=
81  9 9
5.
Reduced Fraction
6.
9
GCF:_______
Factors of 22:
22
40
1, 2, 11, 22
_______________________
1, 2, 4, 5, 8, 10, 20, 40
Factors of 40: ______________________
22  2 11
=
40  2 20
2
GCF:_______
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Name ________________________________
Periodic Review 3
The reduced form of a fraction is when the numerator and denominator have no common factor except 1.
To reduce a fraction means to change it into reduced form.
NOT a Reduced Fraction
12 1, 2, 3, and 6 are common
Reduce fractions.
18 factor of 12 and 18
Step #1: Find the factors of the numerator and denominator.
Step #2: Identify the GCF and write it on the line. (circle)
Step #3: Reduce the fraction by dividing the numerator and denominator by the GCF. (circle)
Step #4: Interpret the reduced fraction. “The reduced form of ____ is _____.”
1.
36
63
36  9 4
=
63  9 7
No common
factor except 1
1, 2, 4, 5, 10, 20
_______________________
2.
Factors of 20:
Factors of 63: ______________________
1, 3, 7, 9, 21, 63
20
85
Factors of 85: ______________________
1, 5, 17, 85
9
GCF:_______
1,
2, 4, 7, 14, 28
_______________________
Factors of 28:
28
70
28  14 2
=
70  14 5
1, 2, 5, 7, 10, 14, 35, 70
Factors of 70: ______________________
5.
Factors of 18:
18  18 1
=
72  18 4
2
3
Factors of 36: 1,_______________________
2, 3, 4, 6, 9, 12, 18, 36
3.
18
72
Reduced Fraction
14
GCF:_______
1, 2, 3, 6, 9, 18
_______________________
1, 2, 3, 4, 6, 8, 9, 12, 18,
Factors of 72: ______________________
18
GCF:_______
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24, 36, 72
20  5 4
=
85  5 17
5
GCF:_______
4.
Factors of 30:
30
50
30  10 3
=
50  10 5
1, 2, 3, 5, 6, 10, 15, 30
_______________________
1, 2, 5, 25, 10, 50
Factors of 50: ______________________
10
GCF:_______
1, 3, 9, 27
_______________________
6.
Factors of 27:
27
45
1, 3, 5, 9, 15, 45
Factors of 45: ______________________
27  9 3
=
45  9 5
9
GCF:_______
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Teacher
with CFU
Is the fraction in reduced form?
1
8
Yes
[ How did I know if the fraction was in reduced form? ]
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
with CFU
Is the fraction in reduced form?
3
10
Yes
[ How did you know if the fraction was in reduced form? ]
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Teacher
with CFU
Is the fraction in reduced form?
9
12
No
[ How did I know if the number was in reduced form? ]
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
with CFU
Is the fraction in reduced form?
2
10
No
[ How did you know if the fraction was in reduced form? ]
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
Is the fraction in reduced form?
4
7
Yes
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
Is the fraction in reduced form?
7
21
No
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
Is the fraction in reduced form?
10
30
No
DataWORKS Educational Research
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©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
Is the fraction in reduced form?
9
11
Yes
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
Is the fraction in reduced form?
5
9
Yes
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
Flashcard (Reduced Form)
The reduced form of a fraction is when the numerator and denominator
have no common factor except 1.
To reduce a fraction means to change it into reduced form.
Students
with CFU
Is the fraction in reduced form?
8
12
Return to Concept
Development
No
[ How did you know if the fraction was in reduced form? ]
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Flashcard (Reduced Form)
EDI – Cognitive, Teaching and English Learners Strategies
Learning Objective : Today, we will reduce fractions.
Cognitive Strategies
Teaching Strategies
Elaboration
Demonstration
Targeted vocabulary: reduced form, common, referred, identify, interpret
Language Strategies
Vocabulary Words
Academic
common, referred, identify, interpret
Content
reduced form
Support
Multiple-Meaning
Vocabulary
Strategy
Synonym
common, referred, identify, interpret
Definition
reduced form
Homophone
Internal Context Clue
Listen, Speak
Read
Similar Sounds
Tracked Reading
Decoding Rules
Write
Writing
Content Access Strategies
Comprehensible
Input
Cognates
Graphic Organizer
Contextual Clues
Contextualized
Definitions
Pictures
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.
Blank Page
DataWORKS Educational Research
(800) 495-1550 • www.dataworks-ed.com
©2012 All rights reserved.
Comments? [email protected]
6th Grade Number Sense 2.4 (3Q)
Determine the least common multiple and the greatest common divisor of whole
numbers; use them to solve problems with fractions (e.g., to find a common
denominator to add two fractions or to find the reduced form of a fraction).
Lesson to be used by EDI-trained teachers only.