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I see you uploaded an image containing mathematical problems. The seventh question in the image seems to involve solving a mathematical expression for simplification. Let me transcribe it:

**7. Simplify:**

\[
\frac{4}{5} \times 20 - \frac{1}{2} + \frac{1}{4}
\]

I'll simplify this for you step by step:

### Step 1: Solve the multiplication

\[
\frac{4}{5} \times 20 = \frac{4 \times 20}{5} = \frac{80}{5} = 16
\]

### Step 2: Substitute into the expression

\[
16 - \frac{1}{2} + \frac{1}{4}
\]

### Step 3: Get a common denominator for the fractions

The least common denominator (LCD) between 2 and 4 is 4. So, we rewrite the fractions:

\[
\frac{1}{2} = \frac{2}{4}
\]

Now the expression becomes:

\[
16 - \frac{2}{4} + \frac{1}{4}
\]

### Step 4: Combine the fractions

\[
\frac{-2 + 1}{4} = \frac{-1}{4}
\]

### Step 5: Final calculation

\[
16 - \frac{1}{4} = \frac{64}{4} - \frac{1}{4} = \frac{63}{4}
\]

So the final answer is:

\[
\boxed{\frac{63}{4}}
\]

Would you like more details or have any questions?

Here are five related questions:
1. How do you convert mixed fractions into improper fractions for simplification?
2. How do you determine the least common denominator when working with fractions?
3. Can you explain how to handle subtraction between mixed numbers?
4. How would you simplify an expression involving both multiplication and division of fractions?
5. What are some common mistakes when adding and subtracting fractions?

**Tip**: Always simplify your fractions as early as possible in a problem to make calculations easier!

Learn how to simplify a fraction expression involving multiplication, addition, and subtraction of fractions: (4/5) * 20 - 1/2 + 1/4. Follow the step-by-step solution with clear explanations on how to handle fractions. Suitable for students in Grade 6-8.

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