https://file.aiquickdraw.com/mathbot/file/1725330541768tymd905y.jpg

https://file.aiquickdraw.com/mathbot/file/1725330541770d5af8y6d.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 step by step.

1. The prices given in the first image are:
   - Tetikus (Mouse): RM49
   - Kekunci (Keyboard): RM149
   - Monitor: RM279

2. Prakash added these prices using a calculator, and the result displayed on the calculator was 342.

3. Let's add the prices manually to check the correct sum:
   \[
   49 + 149 + 279 = 477
   \]

The correct total should be **RM477**, not RM342. Therefore, Prakash made an error in adding the prices together. 

The mistake was likely either a keying error or an arithmetic mistake on the calculator.

Would you like further details, or do you have any questions?

Here are some related questions to consider:
1. What would the correct total be if one of the prices were misread?
2. How could Prakash verify his calculation to avoid such mistakes in the future?
3. What other potential errors could occur when manually calculating sums?
4. How might rounding affect calculations in a similar scenario?
5. Could any discounts have led to a different expected total?

**Tip:** Always double-check your work, especially when handling multiple numbers.

Analyzing Prakash's error in adding prices for a mouse, keyboard, and monitor using a calculator. Learn how to correctly add prices and avoid calculation mistakes. Suitable for middle school students studying basic arithmetic and calculator operations.

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