Page 40 - NUMINO TG_5A
P. 40
02Factors Unit
Math VoCabulary common factor: numbers that are factors of two or more numbers
1 . Find the common factors. b. 12 and 16 1. Have students use what they have learned
in the previous page to find factors of two
a. 6 and 15 Factors of 12: 1, 2, 3, 4, 6, 12 numbers and then find the common factors.
Factors of 16: 1, 2, 4, 8, 16
Factors of 6: 1, 2, 3, 6 Common factors of 12 and 16: 2. Have them find the common factors of two
Factors of 15: 1, 3, 5, 15 numbers.
Common factors of 6 and 15: 1, 2, 4 Example: 2b. 19 and 57
19: Have students understand that 19 is a
1, 3
prime number, so it has 1 and 19 as its
2 . Find the common factors. b. 19 and 57 only factors.
57: Just because a number is an odd
a. 18 and 30 1, 19 number, it does not mean that it is a
prime number. Have students divide 57
1, 2, 3, 6 by numbers 1 to 9 and find its factors.
57 1 57, 57 3 19.
3 . Find the common factors using the Venn diagram. Write them in the So, the factors of 57 are 1, 3, 19 , and 57.
shaded area. 3. Have students use the Venn diagram to
find the common factors. Since common
a. 12 and 15 b. 18 and 24 factors of two numbers are the same
numbers that appear in both sets of factors,
Factors of 12 Factors of 15 Factors of 18 Factors of 24 they can use the numbers that come in the
shaded area in the Venn diagram.
2, 4, 6, 12 1, 3 5, 15 9, 18 1, 2, 4, 8, 12, 24
3, 6
2. Factors 15
Have students find the factors in the following way.
Example: The factors of 12.
Method 1: Divide 12 by numbers 1 to 12 and find the numbers that divide evenly.
12 1 12, 12 2 6, 12 3 4, 12 4 3, 12 6 2, 12 12 1
Method 2: Find two numbers that can be multiplied to give the product of 12.
12 1 12, 12 2 6, 12 3 4, 12 4 3, 12 6 2, 12 12 1
The factors of 12 are 1, 2, 3, 4, 6, and 12.
5A Unit 02 023
Math VoCabulary common factor: numbers that are factors of two or more numbers
1 . Find the common factors. b. 12 and 16 1. Have students use what they have learned
in the previous page to find factors of two
a. 6 and 15 Factors of 12: 1, 2, 3, 4, 6, 12 numbers and then find the common factors.
Factors of 16: 1, 2, 4, 8, 16
Factors of 6: 1, 2, 3, 6 Common factors of 12 and 16: 2. Have them find the common factors of two
Factors of 15: 1, 3, 5, 15 numbers.
Common factors of 6 and 15: 1, 2, 4 Example: 2b. 19 and 57
19: Have students understand that 19 is a
1, 3
prime number, so it has 1 and 19 as its
2 . Find the common factors. b. 19 and 57 only factors.
57: Just because a number is an odd
a. 18 and 30 1, 19 number, it does not mean that it is a
prime number. Have students divide 57
1, 2, 3, 6 by numbers 1 to 9 and find its factors.
57 1 57, 57 3 19.
3 . Find the common factors using the Venn diagram. Write them in the So, the factors of 57 are 1, 3, 19 , and 57.
shaded area. 3. Have students use the Venn diagram to
find the common factors. Since common
a. 12 and 15 b. 18 and 24 factors of two numbers are the same
numbers that appear in both sets of factors,
Factors of 12 Factors of 15 Factors of 18 Factors of 24 they can use the numbers that come in the
shaded area in the Venn diagram.
2, 4, 6, 12 1, 3 5, 15 9, 18 1, 2, 4, 8, 12, 24
3, 6
2. Factors 15
Have students find the factors in the following way.
Example: The factors of 12.
Method 1: Divide 12 by numbers 1 to 12 and find the numbers that divide evenly.
12 1 12, 12 2 6, 12 3 4, 12 4 3, 12 6 2, 12 12 1
Method 2: Find two numbers that can be multiplied to give the product of 12.
12 1 12, 12 2 6, 12 3 4, 12 4 3, 12 6 2, 12 12 1
The factors of 12 are 1, 2, 3, 4, 6, and 12.
5A Unit 02 023
