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Mathematics Form 3 Chapter 2 Standard Form

7. State each of the following numbers in standard form. PL 1 PL 2
Nyatakan setiap nombor yang berikut dalam bentuk piawai.

Example
(a) 0.0045 = (b) 0.00025 =
0.033 =
4.5 × 10 –3 2.5 × 10 –4
3.3 × 10 –2
(c) 0.000076 = (d) 0.00000056 = (e) 0.9093 =
7.6 × 10 –5 5.6 × 10 –7 9.093 × 10 –1

8. Convert each of the number in standard form to single number. PL 1 PL 2
Tukar setiap nombor dalam bentuk piawai kepada nombor tunggal.

Example
(a) 5 × 10 = (b) 5.5 × 10 =
3
2 × 10 =
4
5 000 55
20 000
5
3
(c) 3.46 × 10 = (d) 8 × 10 = (e) 3.69 × 10 =
3 460 800 000 36.9

9. Convert each of the number in standard form to single number. PL 1 PL 2
Tukar setiap nombor dalam bentuk piawai kepada nombor tunggal.

Example
(a) 1 × 10 = (b) 6.5 × 10 =
–3
–4
–2
2 × 10 =
0.0001 0.0065
0.02
–4
(c) 8.6 × 10 = (d) 9 × 10 = (e) 3.68 × 10 =
–6
–6
0.00086 0.000009 0.00000368
10. Calculate each of the following and state the answer in standard form. PL 3
Hitung setiap yang berikut dan nyatakan jawapan dalam bentuk piawai.

Example
(a) 4.44 × 10 + 0.21 × 10 3
3
2.3 × 10 + 4.3 × 10 3 = (4.44 + 0.21) × 10 3
2
3
3
= (0.23 × 10 ) + (4.3 × 10 ) Common factor = 4.65 × 10 3
= (0.23 + 4.3) × 10 3 Faktor sepunya
= 4.53 × 10 3
(b) 4.5 × 10 – 3.2 × 10 4 (c) 640 × 110 ÷ 1 800
5
5
= 4.5 × 10 – 0.32 × 10 5 = 70 400 ÷ 1 800
= (4.5 – 0.32) × 10 5 = 7.04 × 10 ÷ 1.8 × 10 3
4
= 4.18 × 10 5 = 3.91 × 10 4 – 3
= 3.91 × 10

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02 TOP MATH F3.indd 11 03/01/2020 8:00 AM