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Ronald Hui Tak Sun Secondary School
Mathematics Ronald Hui Tak Sun Secondary School
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Mathematics Keep silence in the class No talking when I talk
What should be ready in the next lesson? Textbook Erasable Pens/Pencils Notebook & folder Ronald HUI
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Multiples (p.0.9) Multiples (倍數) What is the rule?
Multiples of 2: 2, 4, 6, 8, … Multiples of 3: 3, 6, 9, 12, … Multiples of 4: 4, 8, 12, 16, … Multiples of 5: 5, 10, 15, 20, … Multiples of 6: 6, 12, 18, 24, … What is the rule? Ronald HUI
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Multiples (p.0.9) How many multiples of 2 do we have?
Is there any number having limited number of multiples? Is 0 a multiple of 2? Normally, multiples are used on natural numbers only Ronald HUI
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Multiplication Table Ronald HUI
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Factors (p.0.9) 4 is a multiple of 2 2 is a factor (因子) of 4.
What is the rule? Ronald HUI
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Factors (p.0.9) Find all factors of 18. 18 1 = 18 1 is a factor
18 4 = 4.5 4 is NOT a factor 18 5 = 3.6 5 is NOT a factor 18 6 = 3 6 is a factor 18 7 = 2… 7 is NOT a factor Ronald HUI
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Factors (p.0.9) Find all factors of 18.
18 = 1 x 18 18 = 2 x 9 18 = 3 x 6 18 = 6 x 3 18 = 9 x 2 18 = 18 x 1 Factors of 18: 1, 2, 3, 6, 9, 18 Ronald HUI
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Factors (p.0.9) Factors of 18: 1, 2, 3, 6, 9, 18
Any number is divisible by 1 1 is a factor of any number Even numbers are divisible by 2 2 is a factor of any even number Any number is divisible by itself Any number is a factor of itself Ronald HUI
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Enjoy the world of Mathematics!
Good Luck! Enjoy the world of Mathematics! Ronald HUI
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