Math Y7 C1 Integers HCF Highest Common Factors
Presentation
•
Mathematics
•
7th Grade
•
Easy
Standards-aligned
Kewin Aljoe
Used 2+ times
FREE Resource
8 Slides • 30 Questions
1
Highest Common Factor
by L. Patterson
2
Lets start with a little revision activity
3
Poll
Which definition best describe a factor?
A factor is a number that yields no remainder when divided into another number.
.
4
Multiple Choice
What is a Product?
.
A product is the Result of multiplying two or more numbers
5
Poll
which are factors?
1 is always a factor
Factors will never leave a remainder when used to divide
All numbers have itself as a factor
6
Poll
which numbers are factors in the equations below
6 x 5 = 30
6
5
7
Multiple Choice
What is a Product?
A product is a number that yields no remainder when divided into another number.
A prod is the Result of multiplying two or more numbers
8
Multiple Choice
Which definition best describe a factor?
A factor is a number that yields no remainder when divided into another number.
A factor is the Result of multiplying two or more numbers
9
Poll
Which best describe the factors of 12
.
1, 2, 3, 4, 6, 12
10
Poll
Which best describe the factors of 7
1 & 7
.
11
Multiple Select
which are factors?
1 is always a factor
Factors will never leave a remainder when used to divide
Numbers that are used in multiplication to find the product (result) are NOT factors.
All numbers have itself as a factor
12
Multiple Select
which numbers are factors in the equations below
6 x 5 = 30
6
30
5
none
13
Multiple Choice
Which best describe the factors of 12
1 & 12
2, 3, 6 & 12
1, 2, 6, 12
1, 2, 3, 4, 6, 12
14
Multiple Choice
Which best describe the factors of 7
1 & 7
0, 2, 3, 6 & 7
1, 2, 3, 7
1, 3, 4, 7
15
Common Factor
"Factors" are numbers we can multiply together to get another number.
When we find the factors of two or more numbers, and then find that some factors are the same ("common"),
then they are the "common factors".
Example: 12 and 16
• The factors of 12 are: 1, 2, 3, 4, 6 and 12
• The factors of 16 are: 1, 2, 4, 8 and 16
So the common factors of 12 and 16 are: 1, 2 and 4
16
Poll
What are the Common Factors of the following numbers:
21 & 24
.
1, 3
17
Multiple Choice
What are the Common Factors of the following numbers:
21 & 24
1, 3, 7
1, 3
3, 7
1, 2, 3, 7, 12
18
Poll
True or false
HCF stands for Highest common factor?
True
True
19
Poll
True or false
HCF can also be called GCD
True
True
20
Multiple Choice
True or false
HCF stands for Highest common factor?
True
False
21
Multiple Choice
True or false
HCF can also be called GCD
True
False
22
Poll
In the list of common factors below:
1, 3, 7, 15,
15 is the HCF?
True
true
23
Multiple Choice
In the list of common factors below:
1, 3, 7, 15,
15 is the HCF?
True
False
24
25
Draw
Find the HCF of 12 and 16...
26
Draw
Find the HCF of 8 and 16...
27
Draw
28
Draw
Find the HCF of 8 and 12...
29
Multiple Choice
Find the HCF of 12 and 16...
2
4
6
8
30
Multiple Choice
31
Multiple Choice
32
Multiple Choice
33
Multiple Choice
Find the HCF of 30 and 25
5
6
10
15
34
Multiple Choice
Find the HCF of 20 and 24
6
4
5
12
35
Refer to workbook Exercises
36
37
38
Highest Common Factor
by L. Patterson
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