Simplify the following using brackets.
`428 xx 20`

Answer

To simplify the expression \( 428 \times 20 \) using brackets, we can follow these steps:

### Step-by-Step Solution:

1. **Rewrite 428**:
We can express 428 as the sum of two numbers:
\[ 428 = 400 + 28 \]
So, we can rewrite the expression as:
\[ 428 \times 20 = (400 + 28) \times 20 \]

2. **Apply the Distributive Property**:
Using the distributive property, we can distribute \( 20 \) to both \( 400 \) and \( 28 \):
\[ (400 + 28) \times 20 = 400 \times 20 + 28 \times 20 \]

3. **Calculate Each Part**:
- First, calculate \( 400 \times 20 \):
\[ 400 \times 20 = 8000 \]
- Next, calculate \( 28 \times 20 \):
\[ 28 \times 20 = 560 \]

4. **Add the Results**:
Now, we add the two results together:
\[ 8000 + 560 = 8560 \]

5. **Final Answer**:
Therefore, the simplified result of \( 428 \times 20 \) is:
\[ 8560 \]