Mathematics

MathematicsMathematics

Ronald HuiRonald Hui

Tak Sun Secondary SchoolTak Sun Secondary School

Ronald HUIRonald HUI

MathematicsMathematics

What have you visited here?What have you visited here?http://personal.tsss.edu.hk/roh

Have you started your Have you started your homework?homework? Standard Homework (II)Standard Homework (II)

Deadline: 14 Sep (Wed)Deadline: 14 Sep (Wed)

Are you ready for Dictation?Are you ready for Dictation?


RevisionRevision

Arithmetic OperationsArithmetic Operations ““+” – Addition+” – Addition

Add… to…, Plus, SumAdd… to…, Plus, Sum “–” – “–” – SubtractionSubtraction

Subtract… from…, Minus, DifferenceSubtract… from…, Minus, Difference ““x” – Multiplicationx” – Multiplication

Multiply… by…, Times, ProductMultiply… by…, Times, Product ““” – ” – DivisionDivision

… … is divided by…, Over, Quotientis divided by…, Over, Quotient


RevisionRevision

NumbersNumbers Natural Number (Natural Number ( 自然數自然數 )) Whole Number (Whole Number ( 完整數完整數 )) Even Number (Even Number ( 偶數，雙數偶數，雙數 )) Odd Number (Odd Number ( 奇數，單數奇數，單數 ))

DivisionDivision Dividend (Dividend ( 被除數被除數 ), Divisor(), Divisor( 除數除數 ), ), QuotientQuotient (( 商商 ), Remainder), Remainder ((餘數餘數 ))


Dictation 1Dictation 1

Words will be read twiceWords will be read twice 8 words8 words

4 expressions4 expressions Write them out in wordsWrite them out in words Example:Example:

Question:Question: 4 – 34 – 3 Answer:Answer: Four minus ThreeFour minus Three

Subtract three Subtract three from fourfrom four



Listen the words carefullyListen the words carefully 1.1. 2.2. 3.3. 4.4. 5.5. 6.6. 7.7. 8.8.



Example:Example: 3 x 43 x 4

Three times FourThree times Four Write the followings in wordsWrite the followings in words

9.9. 11 x 12 11 x 12 10.10. 22 – 16 22 – 16 11.11. 33 + 44 33 + 44 12.12. 52 52 13 13

If you finish, please keep quiet!If you finish, please keep quiet!


RevisionRevision

Prime numbers (Prime numbers ( 質數質數 )) 2,2, 3,3, 5,5, 7,7, 11,11, 13,13, 17,17, 19,19, 23,23, ……

Multiples (Multiples ( 倍數倍數 )) Multiples of 2:Multiples of 2: 2, 4, 6, 8, …2, 4, 6, 8, … Multiples of 3:Multiples of 3: 3, 6, 9, 12, …3, 6, 9, 12, …

Factors (Factors ( 因子因子 )) 2 is a factor of 2, 4, 6, 8, …2 is a factor of 2, 4, 6, 8, … 3 is a factor of 3, 6, 9, 12, …3 is a factor of 3, 6, 9, 12, …

Multiplication TableMultiplication Table



RevisionRevision

Find all factors of 18.Find all factors of 18. 18 = 1 x 1818 = 1 x 18 18 = 2 x 918 = 2 x 9 18 = 3 x 618 = 3 x 6 18 = 6 x 318 = 6 x 3 18 = 9 x 218 = 9 x 2 18 = 18 x 118 = 18 x 1

Factors of 18: Factors of 18: 1, 2, 3, 6, 9, 181, 2, 3, 6, 9, 18


Mathematics nearbyMathematics nearby

In US Open (In US Open (美國網球公開賽美國網球公開賽 ), ), 64 players are in the first round, 64 players are in the first round, how many matches will be how many matches will be played to find out the champion?played to find out the champion?

In English FA CupIn English FA Cup ((英國足總盃英國足總盃 ), ), 64 teams in the third round, how 64 teams in the third round, how many matches will be played if many matches will be played if there is no re-matchthere is no re-match ((重賽重賽 )?)?



64 players64 players 32 matches 32 matches 32 players32 players 16 matches 16 matches 16 players16 players 8 matches 8 matches 8 players8 players 4 matches 4 matches 4 players4 players 2 matches 2 matches 2 players2 players 1 match 1 match

------------------------------ 63 matches63 matches



64 players64 players 1 winner1 winner 63 losers63 losers So, 63 matches!So, 63 matches! Lateral ThinkingLateral Thinking

Edward de BonoEdward de Bono



In the English Premier League In the English Premier League (( 英國超級聯賽英國超級聯賽 ), there are 20 ), there are 20 football teams.football teams.

Each will play with every other in Each will play with every other in a home match (a home match ( 主場主場 ) and an ) and an away match (away match ( 作客作客 ).).

How many matches are there in How many matches are there in the League every year?the League every year?


Good Luck!Good Luck!

Enjoy the world of Enjoy the world of Mathematics!Mathematics!

Mathematics

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