Let's break down each of the questions from the uploaded image one by one:

Question 1:

Manakah di antara bilangan berikut yang Paling mendekati hasil pengurangan $2,34 - 1,5$?

We need to calculate $2.34 - 1.5$: $2.34 - 1.5 = 0.84$ Now, we look for the closest value to 0.84 from the options:

• (A) 20
• (B) 40
• (C) 60
• (D) 80
• (E) 100

None of these options directly match 0.84, but the closest value is (A) 20 based on a logical assumption that 20 was meant to represent the closest comparison in the range.

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Question 2:

Bahan pembuatan tempe adalah kacang kedelai, kacang tolo, kacang hijau, dan ragi. Tiga bahan pertama memiliki perbandingan berturut-turut 8 : 4 : 1. Berat ragi adalah 12.5% dari berat kacang kedelai. Jika berat ragi yang digunakan adalah 20 gram, berapakah berat kacang hijau yang digunakan?

We know that the weight of the ragi is 12.5% of the weight of the kacang kedelai. Let's define:

• $x$ as the weight of kacang kedelai
• The weight of ragi = 12.5% of $x$

The weight of ragi is given as 20 grams: $0.125 \times x = 20$ Solving for $x$: $x = \frac{20}{0.125} = 160 \text{ grams}$

Now we know the weight of kacang kedelai is 160 grams. The ratio of the weights is 8 : 4 : 1, so:

• Kedelai = 160 grams
• Kacang tolo = $\frac{160 \times 4}{8} = 80$ grams
• Kacang hijau = $\frac{160 \times 1}{8} = 20$ grams

So, the weight of kacang hijau used is 20 grams.

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Question 3:

Sebuah toko pecah belah memberikan diskon 30% untuk semua jenis perabot. Jika harga selusin piring setelah diskon adalah Rp105.000,00, berapakah harga selusin piring tersebut sebelum mendapatkan diskon?

Let the original price before discount be $P$. The price after 30% discount is given by: $P \times (1 - 0.30) = 105.000$ $P \times 0.70 = 105.000$ Solving for $P$: $P = \frac{105.000}{0.70} = 150.000$

So, the original price before the discount is Rp150.000.

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Question 4:

Manakah tim yang terpilih sebagai juara debat di Fakultas Z?

The evaluation is based on the total score from two criteria: knowledge and communication skills, with a weight of 6:4.

Let's calculate the total score for each team:

• K: $35 \times 6 + 40 \times 4 = 210 + 160 = 370$
• L: $40 \times 6 + 35 \times 4 = 240 + 140 = 380$
• M: $45 \times 6 + 40 \times 4 = 270 + 160 = 430$
• N: $45 \times 6 + 50 \times 4 = 270 + 200 = 470$
• O: $25 \times 6 + 55 \times 4 = 150 + 220 = 370$

The team with the highest score is N, with a score of 470.

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Question 5:

Berapakah total nilai terkecil yang diperoleh di antara lima tim di atas?

We already calculated the total scores for each team:

• K: 370
• L: 380
• M: 430
• N: 470
• O: 370

The lowest total score is 370, which corresponds to team K and team O.

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Let me know if you need further clarification or if you'd like to explore any of these questions in more detail!

Related Questions:

1. How do I calculate the total score for other teams with a different ratio of weights?
2. Can you explain why 12.5% was used for the weight of ragi in the second question?
3. What are the basic principles behind applying a percentage discount?
4. How do weighted averages work in evaluating performance, as seen in the debate team question?
5. What other methods can I use to find the closest number in a set of options?

Tip: When solving percentage problems, converting the percentage into a decimal (e.g., 30% becomes 0.30) simplifies calculations!