Page 12 - PBD Plus Matematik T1 (EG)

Matematik Tingkatan 1 Bab 1 Nombor Nisbah

SP 1.2.6 Menyelesaikan masalah yang melibatkan integer.

15. Selesaikan masalah berikut.
Solve the following problems.
(a) Suhu awal cecair di dalam sebuah bikar ialah 19°C. Bikar itu dipanaskan dan suhunya meningkat sebanyak
71°C selepas setengah jam. Kemudian, bikar itu dibiarkan dan suhu menurun sebanyak 2°C setiap minit
selama setengah jam. Apakah suhu akhir cecair itu selepas satu jam? TP 4 KBAT Menganalisis
The initial temperature of a liquid in a beaker is 19°C. The beaker is heated and its temperature increased by 71°C after half an hour.
Then, the beaker is left and the temperature decreased by 2°C every minute for half an hour. What is the final temperature of the liquid
after one hour?
Suhu akhir cecair / Final temperature of the liquid Tip Penting
Penerbitan Pelangi Sdn. Bhd.
= 19 + 71 – 2(30) Suhu meningkat menunjukkan tanda ‘+’.
= 19 + 71 – 60 Suhu menurun menunjukkan tanda ‘–’.
= 90 – 60 Temperature increased shows ‘+’ sign.
Temperature decreased shows ‘–’ sign.
= 30°C

(b) Harga sebuah rumah kos rendah ialah RM120 000. Jika harganya menurun sebanyak RM50 setiap 4
bulan, berapakah harga rumah itu selepas tiga tahun? TP 5
The price of a low cost house is RM120 000. If the price drops RM50 every 4 months, what is the price of the house after three years?
Harganya menurun sebanyak RM50 setiap 4 bulan. Selepas tiga tahun / After three years,
The price drops RM50 every 4 months. 3 × RM150 = RM450
Dalam 1 tahun / In 1 year
12 ÷ 4 = 3 kali penurunan harga \ Harga rumah itu selepas tiga tahun:
3 times of price drops The price of the house after three years:
Setiap tahun, harga rumah menurun sebanyak: RM120 000 – RM450 = RM119 550
Every year, the price of the house drops:
RM50 × 3 = RM150

(c) Rajah di bawah menunjukkan rekod transaksi Khairi bagi bulan Februari. TP 6 KBAT Mengaplikasi
The diagram below shows Khairi’s transaction record in February.

No. akaun / Account no.: 12345678 BANK BERSATU
Debit / Debit Kredit / Credit
Tarikh / Date Butir / Description
(RM) (RM)
Pindahan dana ke akaun
03-02-18 320
Fund transfer to account
10-02-18 Bil / Bills 175
13-02-18 Deposit wang tunai 50
Cash deposit
17-02-18 Pindahan daripada akaun 80
Transfer from account

Berdasarkan transaksi tersebut, nyatakan baki wang dalam akaun Khairi pada bulan Februari. Kemudian,
huraikan maksud baki tersebut.
Based on the transaction, state the balance in Khairi’s account in February. Hence, describe the meaning of the balance.
Baki wang / Balance amount = 320 + (–175) + 50 + (–80)
= 320 – 175 + 50 – 80
= 145 + 50 – 80
= 195 – 80
= RM115
Baki wang Khairi dalam akaun bernilai positif. Ini bermaksud Khairi mempunyai baki dalam akaunnya
sebanyak RM115.
Khairi’s balance in the account is a positive value. This means Khairi has balance of RM115 in his account.

Cuba jawab Praktis Masteri 1, Bhgn A, S5; Bhgn C, S10(a)

TAHAP PENGUASAAN 1 2 3 4 5 6 5 © Penerbitan Pelangi Sdn. Bhd.

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