https://file.aiquickdraw.com/mathbot/file/1724214615416r0kwox5r.jpg

https://file.aiquickdraw.com/mathbot/file/17242146154176zyzuhig.jpg

Prakash menambah setiap harga bagi tetikus, kekunci dan monitor dengan menggunakan kalkulator. Jawapan pada kalkulator ialah 342.   


Jawapan Prakash adalah tidak betul.   


UNIT 8: ITEM 8a

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Antara yang berikut, yang manakah kesilapan yang telah dibuat oleh Prakash?   

Let's analyze the problem by calculating the correct sum of the prices of the mouse (tetikus), keyboard (kekunci), and monitor. Then, we will compare the correct result to the number shown on the calculator to identify Prakash's mistake.

### Prices Given:
- **Tetikus (Mouse)**: RM48
- **Kekunci (Keyboard)**: RM149
- **Monitor**: RM279

### Step 1: Calculate the Correct Sum
Add the prices together:

\[
\text{Total} = 48 + 149 + 279
\]

\[
\text{Total} = 476
\]

### Step 2: Compare to Prakash's Result
The calculator shows **342** as the result.

### Step 3: Determine the Mistake
Prakash's answer of **342** is incorrect. Let's explore possible errors:

1. **Transposition Error**: Prakash may have accidentally transposed or misentered digits in the calculator.
2. **Partial Addition**: It's possible that Prakash only added two of the three items, or accidentally left out one item.

### Step 4: Analyze Possible Errors
Let's check the sums of possible partial additions to see where the error might have occurred:

- \( 48 + 149 = 197 \) (Not equal to 342)
- \( 48 + 279 = 327 \) (Not equal to 342)
- \( 149 + 279 = 428 \) (Not equal to 342)

None of these pairs of additions match **342**, so the issue is more likely related to an input or calculation error.

### Conclusion
The mistake Prakash made was likely a simple calculation or data entry error on the calculator. The correct total should be **476**, but due to the error, the calculator displayed **342**.

Would you like further details or have any other questions?

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### Related Questions:
1. What is the difference between Prakash's incorrect result and the correct total?
2. How could Prakash verify his results to avoid such mistakes in the future?
3. If Prakash accidentally input the wrong price for the monitor, what might he have entered to get 342?
4. What are some common types of calculator errors, and how can they be avoided?
5. How does the placement of parentheses affect calculations in more complex arithmetic operations?

### Tip:
Always double-check each entry when using a calculator, especially when multiple steps are involved.

Explore Prakash's calculation error involving the prices of a mouse, keyboard, and monitor. Learn how to identify and correct common calculator mistakes. Suitable for general audiences seeking insights into mathematical accuracy and problem-solving.

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