konsep peratus
TRANSCRIPT
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KONSEP PERATUS
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PERCENTAGE
Concept
ArithmeticTeaching kits
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Perkataan percent diambil daripada
perkataan Latin iaitu per centum. cent bermaksud seratus.
Simbol % digunakan untuk mewakili peratus.Simbol tersebut berkemungkinan tercipta
semasa abad ke-15.
Menariknya, simbol % mengandungi 2 sifar
seperti angka 100.
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Menurut MokS
oonS
ang &S
iew Fook Cheong(1988) konsep peratus ialah perkiraan yang
dinisbahkan dengan dasar seratus untuk
memudahkan perbandingan.
Perbandingan di antara kuantiti yang sama
jenis di mana kuantiti asas dinisbahkan
sebagai seratus (Mok Soon Sang, 1988).
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The term percent means parts per hundred.
(W. George Cathart et.al, 2006)
The numerators of fractions with a
denominator of 100 are called percents.
(Benny F. Tucker et.al, 2006)
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Example :
7/100
= 7 per ratus
= 7 peratus
= 7 %
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In mathematics, a percentage is a way of
expressing a number as a fractiomn of 100 ( per
cent meaning "per hundred" in Latin). It is often
denoted using the percent sign, "%", or theabbreviation "pct". For example, 45% (read as
"forty-five percent") is equal to 45/100, or 0.45.
(http://en.wikipedia.org/wiki/Percentage)
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Percentages are used to express how
large/small one quantity is, relative to another
quantity.
The first quantity usually represents a part of,
or a change in, the second quantity, which
should be greater than zero.
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For example, an increase of $ 0.15 on a price
of $ 2.50 is an increase by a fraction of
0.15/2.50 = 0.06. Expressed as a percentage,
this is therefore a 6% increase.
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Although percentages are usually used toexpress numbers between zero and one,
any dimensionless proportionality can be
expressed as a percentage.
For instance, 111% is 1.11 and 0.35% is
0.0035.
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Pengiraan Peratus (%)
Contoh 1 :
10% = 10
100= 1 x 100
10
= 10%
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Menukar nombor perpuluhan kepada peratus
(%) Contoh :
0.83
= 0.83 x 100%= 83%
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Menukar nombor pecahan kepada peratus
Contoh :
= 12
25
= 12 x 100
25
= 48%
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Method And Teaching Kits
Activity For Percentages
(Understanding The Meaning Of Percent)
Activity For Percentages
(Lets Go To The Mega Sales)
TEACHING KITS
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ACTIVITY FOR PERCENTAGES
(UNDERSTANDING THE MEANING OF PERCENT)
LEARNING OUTCOMES
To represent percents as fractions withdenominators of 100
To convert fractions with denominators of100 to percent
MATERIALS
100 pieces of one sen coins and 10 x 10 grid
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METHOD AND TEACHING KITS
PERCENT TRICKS
NEWSPAPER KITS OR SETUP CLASSROOM
PERCENTAGE SQUARE
SURVEY
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Pupils arrange 100one cent coins with
head sides facing upon the 10 x 10 grid
Guide pupils to flip over acertain number of coins so
that the tail sides arefacing up
Teacher introducespercents as fractionswith denominators of
100
Pupils flip back theflipped coins. Procedure2 is repeated with other
number of coins
Teacher guides pupil sto conclude on themeaning of percent
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ACTIVITY FOR PERCENTAGES
(LETS GO TO THE MEGA SALES)
LEARNING OUTCOMES
To find the value of a percent from an amount of
money
MATERIALS
A dice marked with 10%.20%,25%,30%,50%,70% on
each of its face for each group
A calculator
Mega sale lists
Activity sheets
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Procedure 1 :- in groups of four each pair of students
take turns to buy any itemsfrom the mega sale list
Procedure 2 :- throw the diceto determine the percentage
of discount
Procedure 3 :- calculate theamount of discount and fill in
the table in activity
Procedure 4:- each pair issupposed to buy any 5 items
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Bibliografi
Mok Soon Sang. (1988). Panduan mengajar
matematik KBSR. Kuala Lumpur: Kumpulan
Budiman Sdn. Bhd.
Mok Soon Sang & Siew Fook Cheong. (1988).
Pengajar an d an pembel ajar an matematik
untuk peringk at sekol ah rend ah. Petaling Jaya:
Longman Malaysia Sdn. Bhd.
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John N. Fujii. (1965). Numbers and arit hmetic.
California: Blaisdell Publishing Company.
Derek Haylock. (2006). Mat hematics ex pl ained
for primary teachers: t hird edition. Lond
on:Sage Publications Ltd.
Benny F. Tucker, Ann H. Singleton & Terry L.
Weaver. (2006). Teaching mat hematics to all children: second edition. New Jersey: PearsonEducation, Inc.
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Frank J. Swetz & Liew Su Tim. (1988).
Pengajar an matematik KBSR. Petaling Jaya:
Penerbit Fajar Bakti Sdn. Bhd.
W. George Cathcart et.al. (2006). Learning
mat hematics in element ary and middle
schools: a learner-centered approach. New
Jersey: Pearson Education, Inc.
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http://en.wikipedia.org/wiki/Percentage