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HOME PLAY: 2011, January 20

Posted by Loh Kwai Yin

1. Refer to the activity on relationship of numbers 12, 36 and 72 (that we did in class).
2. Look at the work that were submitted at the end of the lesson and the marks awarded.
3. Read through the complete working.

HOMEWORK

In Maths (I)

• Attempt Lesson 2 (02) Investigation - Family "DO", "RE", "ME", "FA", "SO", "LA", "TI"
• Refer to the working given in the class activity.
• Do not fold the page. Write neatly. Show all working.
• On the first page, include
• Date: 21 Jan 2011 (Friday)
• Title: Chapter 1: Factors and Multiples
• Label each question with "Investigation - Family....."

Lesson 2 (02) Investigation - Family "DO"

Posted by Loh Kwai Yin

Family "DO":
58, 74, 102, 50, 46, 282

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "DO" that satisfy the relationship(s) you described in (a)

Note: In your description, comment

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "RE"

Posted by Loh Kwai Yin

Family "RE":
75, 305, 200, 130, 155, 550

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "RE" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "MI"

Posted by Loh Kwai Yin

Family "MI":
80, 150, 400, 530, 1000, 370

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "MI" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "FA"

Posted by Loh Kwai Yin

Family "FA":
87, 210, 249, 303, 705, 966

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "FA" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "SO"

Posted by Loh Kwai Yin

Family "SO":
64, 100, 240, 304, 396, 516

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "SO" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "LA"

Posted by Loh Kwai Yin

Family "LA":
81, 90, 234, 504, 333, 1350

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "LA" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Lesson 2 (02) Investigation - Family "TI"

Posted by Loh Kwai Yin

Family "TI":
72, 138, 174, 420, 612, 702

(a) Describe as many relationship(s) as you could about the numbers.
(b) Add 3 members to Family "TI" that satisfy the relationship(s) you described in (a)

• Are the numbers even or odd? or there is no pattern at all?
• Are there prime numbers in this family?
• What are these numbers divisible by?
• What are the common factors of these numbers? How do you find them?
• What is the highest common factor? How do you find it?
• What is the lowest common multiple? How do you find it?

Chapter 1 Activity: Factors and Multiples - Relationships of Numbers

Posted by Loh Kwai Yin

Describe the relationship of these numbers: 12, 36 and 72.
Use words like "Factor", "Multiples", "Prime Numbers", "LCM", "HCF", etc to help describe the relationship.

The relationships are as follow:

• All 3 numbers are positive
• They are all even numbers
• The common factors for these numbers are: 2, 3, 4, 6, 12
• Highest common factor is 12
• Lowest common multiple is 2 x 2 x 3 x 3 x 2 = 72

The proper working is as shown:

What did the groups say?