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Jawab pertanyaan tersebut dengan benar dan berikan caranya 

I will solve the math problems displayed on the board step-by-step. Let's go through each question carefully.

### 1) \(\frac{1}{2} \times 0.3 \div \frac{3}{4}\)

1. First, calculate \(\frac{1}{2} \times 0.3\):
   \[
   \frac{1}{2} \times 0.3 = \frac{0.3}{2} = 0.15
   \]

2. Next, divide by \(\frac{3}{4}\):
   \[
   0.15 \div \frac{3}{4} = 0.15 \times \frac{4}{3} = \frac{0.6}{3} = 0.2
   \]

   So, the answer to the first question is **0.2**.

---

### 2) \(\frac{2}{5} \div \frac{1}{2} \times 0.8\)

1. First, calculate \(\frac{2}{5} \div \frac{1}{2}\):
   \[
   \frac{2}{5} \div \frac{1}{2} = \frac{2}{5} \times 2 = \frac{4}{5}
   \]

2. Then, multiply by 0.8:
   \[
   \frac{4}{5} \times 0.8 = \frac{4 \times 0.8}{5} = \frac{3.2}{5} = 0.64
   \]

   The answer to the second question is **0.64**.

---

### 3) \(0.2 \div \frac{3}{4} \times \frac{2}{7}\)

1. First, calculate \(0.2 \div \frac{3}{4}\):
   \[
   0.2 \div \frac{3}{4} = 0.2 \times \frac{4}{3} = \frac{0.8}{3} = 0.2667
   \]

2. Then, multiply by \(\frac{2}{7}\):
   \[
   0.2667 \times \frac{2}{7} = \frac{0.5334}{7} \approx 0.0762
   \]

   The answer to the third question is approximately **0.0762**.

---

### 4) \(0.4 \times 1\frac{2}{3} \div 0.15\)

1. Convert \(1\frac{2}{3}\) to an improper fraction:
   \[
   1\frac{2}{3} = \frac{5}{3}
   \]

2. Now calculate \(0.4 \times \frac{5}{3}\):
   \[
   0.4 \times \frac{5}{3} = \frac{2}{5} \times \frac{5}{3} = \frac{2}{3} = 0.6667
   \]

3. Next, divide by 0.15:
   \[
   0.6667 \div 0.15 = \frac{0.6667}{0.15} \approx 4.4447
   \]

   The answer to the fourth question is approximately **4.4447**.

---

### 5) \(\frac{5}{6} \times 0.025 \times \frac{3}{4}\)

1. First, calculate \(\frac{5}{6} \times 0.025\):
   \[
   \frac{5}{6} \times 0.025 = \frac{5 \times 0.025}{6} = \frac{0.125}{6} \approx 0.02083
   \]

2. Now, multiply by \(\frac{3}{4}\):
   \[
   0.02083 \times \frac{3}{4} = \frac{0.06249}{4} \approx 0.0156
   \]

   The answer to the fifth question is approximately **0.0156**.

---

Do you have any questions, or would you like more details on any step?

---

Here are 5 related questions for further practice:
1. What is the result of \(\frac{3}{5} \times 0.7 \div \frac{2}{3}\)?
2. Solve \(\frac{4}{7} \div 0.5 \times \frac{1}{3}\).
3. Calculate \(0.25 \times \frac{2}{3} \div 0.2\).
4. What is \(\frac{7}{8} \times 0.4 \div \frac{5}{6}\)?
5. Find the value of \(0.3 \div \frac{4}{5} \times \frac{1}{2}\).

**Tip:** Always simplify fractions or convert them to decimals before performing operations for easier calculations.

Solve the math problems displayed on the board.

Detailed solutions to math problems involving fractions and decimal operations. Learn how to multiply and divide fractions and decimals step by step. Suitable for students in Grades 5-7.

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