Page 20 - Steady Mate Tg1 - Book A

Matematik Tingkatan 1 Bab 1 Nombor Nisbah

Nombor Nisbah
1.5 Rational Numbers BUKU TEKS ms.23 – 25

MESTI TAHU & INGAT

a
Nombor nisbah ialah nombor yang boleh ditulis dalam bentuk pecahan, b , dengan keadaan a dan b ialah integer, b ≠ 0.
a
Rational numbers are numbers that can be written in fractional form, b , where a and b are integers, b ≠ 0.
2
Misalnya / For example, 3 , 1 5 , – 0.5
↓ ↓ ↓
3 7 1
1 5 – 2

R Tandakan (✓) untuk nombor nisbah. TP 2 ARAS R
Mark (✓) for rational numbers.
7 3
8 – 72 2 –0.03
✓ ✓ 9 ✓ 4 ✓ ✓
8 – 72 7 11 – 3
1 1 100
9 4
S Hitung setiap yang berikut. TP 4 ARAS S
Calculate each of the following.

Contoh 1. 0.4 + 1 × – 3 2. – 0.5 – 8 ÷ 8
1 2
2
1
1 5 Lakukan operasi 3 8 9 15
1.6 + 5 × – 2 1 8 15
3
5 16 darab dahulu. 4 5 1 2 = – – ×
Perform the = + × – 2 9 8
1
16 26 5 multiplication 10 3 8
= + × – 2 1 5
10 5 16 first. = 4 – 5 = – 2 – 3
16 13 10 8
= – 3 10
10 8 = 16 – 25 = – 6 – 6
64 65 40 40
= – 13
40 40 = – 9 = – 6
1 40
= – 1
40 = –2
6
1
1
Contoh 3. 17 – (–3.12) ÷ 4.8 – 3 3 2 4. 1 × –0.25 – 1 1 2 ÷ 0.5
1
1 1 20 5 9 4
1 – (–0.33) ÷ –0.4 + 1 2
1
8 2 = 0.85 + 3.12 ÷ (4.8 – 3.6) = 1 × – 1 – 5 2 ÷ 1
= 1.125 + 0.33 ÷ (–0.4 + 1.5) = 0.85 + 3.12 ÷ 1.2 9 4 4 2
1 2
= 1.125 + 0.33 ÷ 1.1 Lakukan operasi = 0.85 + 2.6 = 1 × – 6 × 2
= 1.125 + 0.3 dalam tanda = 3.45 9 4
kurung dahulu.
= 1.425 Perform the = – 1
operation in the 3
brackets first.
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