Page 18 - PBD Plus Matematik T1 (EG)

Matematik Tingkatan 1 Bab 1 Nombor Nisbah

Nombor Nisbah
1.5 Buku Teks ms. 23 – 26
Rational Number

SP 1.5.1 Mengenal dan memerihalkan nombor nisbah.

25. Padankan setiap yang berikut. TP 2
Match each of the following.
Contoh (a) 0.45 (b) π (c) 1.25

2
2 = 8 = 9 = 3.1415… = 1 1
3 3 20 4
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Nombor nisbah Nombor bukan nisbah
Rational number Irrational number

(e) e (e) √ 2 (f) – 4.4 (g) 1.5781…
= 2.7182… = 1.4142… 4
= –1.1

SP 1.5.2 Membuat pengiraan yang melibatkan gabungan operasi asas aritmetik bagi nombor nisbah mengikut tertib operasi.

26. Hitung setiap yang berikut. TP 3
Calculate each of the following.
Contoh 1 1 2
2  2

(a) 9.5 – 1 × 0.5 + (–2.7) (b) 3.8 + 6 – 1.025 ÷ –
2
 1 – 1 2 ÷ (–0.25) = 9.5 – 1.5 × 0.5 – 2.7 8 5
3
5
 2
 2
5
= 3 – 5 ÷ – 1 = 9.5 – 0.75 – 2.7 = (3.8 + 6.125 – 1.025) ÷ – 2
15 4 = 6.05 = 8.9 ÷ – 2
 2
= –2 × (–4) 5
15 = –22 1
8 4
=
15

3


2

(c) –1.45 × –3 3 2 – 0.625 × 4.3 (d) –5.2 + 9 – 6.25 ÷ 1 1 (e) –1.1 ÷ 11 + –1 1 2 × 2.4
8
4
15
4
4
1
3


2

= + 1.45 × 3 3 2 – 0.625 × 4.3 = –5.2 + 9 – 6 1 2 ÷ 1 1 = –1.1 × 15 + –1 × 2.4
4
8
11
4
4
4
1
1
5

=  29 × 15 2 – 2.6875 = –5.2 + 3 ÷ 1 1 = –1.5 + – × 24 2 6
4
8
20
4
10 2
4 1
1
= 87 – 2.6875 = –5.2 + 25 5 × 4 1 = –1 + (–3)
16 8 2 5 1 2
= 2.75 = –5 2 + 2 1 = –4 1
10 2 2
7
= –2
10
Cuba jawab Praktis Masteri 1, Bhgn C, S9(a)(i), S10(c)(ii)
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