8/10/2019 Chapter 4 Mathematical Reasoning (1)_4A

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Name:___________ Teacher: WL Cheng Class : 4A

Lesson No.:11

Sekolah Menengah Seri Omega Date : 2!2!"#Time : 11.$" % 12.4"

S&'(ect: Mathematics

Cha)ter:4

To)ic: Mathematical *easoning +1,

S&'-to)ic: 4.1 Statements

4.1a Statements an Tr&th /al&esNotes:-

1.A statement is a sentence 0hich is either

true or false'&t not both.

2.Sentences 0hich are questions, instructions an exclamations are not statements.

ercise 4.1a

1.Determine 0hether the 3ollo0ing sentences

are statements or not. i5e a reason 3or 6o&r ans0er.

+a, 47289

+', A triangle has $ sies.

+c, The eterior angle o3 a reg&lar heagon is

";.

+, in the area o3 a circle 0ith a rai&s o3 cm.

+3, ?s =9 i5isi'le '6 4@

+g, So 0ie

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2. State 0hether the 3ollo0ing statements aretr&e or 3alse.

+a, A nonagon has 11 sies.

+', -2$ B -49

+c, 4 +-1", $ +-1",

+, mE p, q , rE

+e, The angle s&'tene '6 the iameter o3 a

circle at the circ&m3erence is 19";.

4.1' Statements &sing N&m'ers an

Mathematical S6m'ols

Notes:-

Tr&e an 3alse statements can 'econstr&cte 0ith numbersan

mathematical symbols.

ercise 4.1'

1. Write +i, a tr&e statement an +ii, a 3alsestatement in5ol5ing the 3ollo0ing n&m'ers

an mathematical s6m'ols.

+a, lF 9F #F - F8

+', 2F -4F -F F 8

+c,

1 2

F F F 12 4

>

2==$$4429.oc 2

8/10/2019 Chapter 4 Mathematical Reasoning (1)_4A

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+, )rime n&m'ersE 2EF Fe5en n&m'ers EF8

+e, #F 1F