puncak_usaha_matematik__pmr_zon_b_kuching_2010

8/7/2019 Puncak_usaha_matematik__PMR_zon_B_kuching_2010

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Fractions



Calculate

16

1

43

121

)4

2

4

5(

12

1

)

2

1

4

5(

12

1

)21

411(

121 .1

=

×=

−×=

−×=

−×



2

12

2

5

8

6

3

10

6

8

3

10

)6

5

6

3(

3

10

)65

21(

313 .2

=

=

×=

÷=

+÷=

+÷

Calculate



Decimals



DECIMALSDECIMALS

Relationship Between Decimals & Fractions

x

1 zero

2 zeroes

1 decimal place

2 decimal

places



Place Value & Value of DigitsPlace Value & Value of Digits

Tens Ones Tenths Hundredths Thousandths

4 8 . 5 7 3

40 8 0.5 0.07 0.003

Place value

Value of digit

Decimal Point

DECIMALSDECIMALS



Round Off DecimalRound Off Decimal

• 8.4573 = 8.5 ( 1 decimal place )

• 8.4573 = 8.46 ( 2 decimal places )

• 8.4573 = 8.457 ( 3 decimal places )

equal to 5

7 > 5

3 < 5

DECIMALSDECIMALS



Combined OperationsCombined Operations

( Brackets )

(of)

÷ or ×

+ or ––

DECIMALSDECIMALS



Calculate the value of

3.2 51.

0.08

16=0.08

1600

= 8

=200

× 4 0.182.0.9×

0.72=0.9

7.2

= 9

=0.8



Directed Numbers



DIRECTED NUMBERS

5.02

1=

75.04

3=

25.04

1=

205

1.=

4.05

2=

6.05

3=

8.05

4=

125.081 =

375.08

3=

625.08

5=

875.08

7=

1.0

10

1= 01.0

100

1=

001.01000

1=

30.3

10=

70.7

10=

9 0.910=



83

803

5

43

5

43

.

.

=

+=

+=



Find the value and give your

answer in decimal.

3 13 ( 1 ) 0.3

5 23 1

3 1 0.3

5 23.6 1.5 0.3

5.4

− − +

= + +

= + +

=



SQUARES, SQUARE

ROOTS, CUBES AND

CUBE ROOTS



12 = 1

22 = 4

32 = 9

42 = 16

52 = 25

62 = 36

72 = 49

82 = 64

9

2

= 81102= 100

PERFECT SQUARES



112 = 121

122 = 144

13 2 = 169

14 2 = 196

15 2 = 225

162

= 256

172 = 289

182 = 324

192 = 361

202 = 400252 = 625



416

39

24

11

=

=

=

= 525 =

636 =

749 =

864 =

SQUARE ROOTS



1214411121

10100

981

==

=

=

16256

15225

14196

13169

==

=

=

SQUARE ROOTS



20400

1936118324

17289

=

==

=

625 25=

SQUARE ROOTS



13 = 1

23 = 833 = 27

43 = 6453 =125

63 = 216

73 = 34383 = 512

93 = 729103 = 1000

CUBES



464

327

28

11

3

3

3

3

==

=

=

7343

62165125

3

3

3

=

==

101000

9729

8512

3

3

3

=

==

CUBE ROOTS



STATISTICS



The table shows the hobbies of 240

students.

Hobby Number of students

Swimming 80

Collecting stamps 20

Playing football 100

Reading 40

a. Constructing a pictogram

REPRESENTATIONS OFDATA



represents 10studentskey

Hobby Number of students

SwimmingStamps collecting

Football

Reading

PICTOGRAM

80

20

120

40

ons ruc ng a ar



Based on the information given below,construct a vertical bar chart.

Types of teachers

Language Music Dance

Number of teachers

3 6 5

ons ruc ng a archart

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