Page 18 - Steady Mate Tg1 - Book A

Matematik Tingkatan 1 Bab 1 Nombor Nisbah

Contoh 5. 2.3 × [3.2 – (–1.69)] 6. [– 4.26 – (–3.94)] ÷ 2.56
= 2.3 × (3.2 + 1.69) = (– 4.26 + 3.94) ÷ 2.56
–1.46 × (–5.13 + 2.63) Lakukan = 2.3 × 4.89 = –0.32 ÷ 2.56
= –1.46 × (–2.5) operasi dalam = 11.247 = –0.125
= 3.65 tanda kurung
dahulu.
Perform the
operation in the
brackets first.

Contoh 7. –5.26 – 0.4 × 1.8 + (–3.74) 8. – 4.86 – 21.69 ÷ 4.5 + (–2.98)
= –5.26 – 0.72 – 3.74 = – 4.86 – 4.82 – 2.98
1.82 – 6.24 × 0.5 – (–2.15) = –5.98 – 3.74 = –9.68 – 2.98
= 1.82 – 3.12 + 2.15 = –9.72 = –12.66
= –1.3 + 2.15
= 0.85

Lakukan operasi × atau ÷ dari kiri ke kanan
diikuti operasi + atau – dari kiri ke kanan.
Perform × or ÷ from left to right followed by
+ or – from left to right.

Q Selesaikan setiap yang berikut. ARAS S
Solve each of the following.

Contoh 1. Suatu larutan dihasilkan pada suhu bilik di dalam
makmal sains. Larutan itu kemudian disimpan di dalam
Suhu awal cecair X ialah 5.5°C di bawah 0°C apabila
peti sejuk untuk dibekukan menjadi bahan eksperimen.
dikeluarkan dari peti sejuk. Cecair itu dibiarkan di atas meja
Suhu larutan itu turun 3.8°C sejam selama lapan jam.
dan suhunya naik 1.2°C seminit selama sembilan minit.
Berapakah suhu akhir, dalam °C, larutan itu?
Hitung suhu akhir, dalam °C, cecair itu. [Anggap bahawa suhu bilik ialah 27°C]
The initial temperature of liquid X is 5.5°C below 0°C when taken A solution was produced at room temperature in a science
out from a refrigerator. The liquid is left on the table and its laboratory. The solution was then stored in the refrigerator to
temperature rises 1.2°C each minute for nine minutes. Calculate be frozen into an experimental material. The temperature of the
the final temperature, in °C, of the liquid. TP 4
solution dropped by 3.8°C each hour for eight hours. What is
the final temperature, in °C, of the solution?
[Assume that room temperature is 27°C] TP 4

Suhu akhir cecair X Tanda – mewakili suhu di
Final temperature of liquid X bawah 0°C. Suhu akhir larutan Tanda – mewakili
= –5.5 + 1.2 × 9 – sign indicates temperature Final temperature of the solution suhu menurun.
= –5.5 + 10.8 below 0°C. = 27 + (–3.8 × 8) – sign indicates a
= 5.3°C = 27 + (–30.4) drop in temperature.
= –3.4 C
o

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