Question

8x1000 +4x100 + 7x10 + 1x1 + 7x10 + 1x1 + 7x1/10

Answer 1

Let's break down the expression step by step:

1. **Calculate each term**:
- \( 8 \times 1000 = 8000 \)
- \( 4 \times 100 = 400 \)
- \( 7 \times 10 = 70 \)
- \( 1 \times 1 = 1 \)
- \( 7 \times 10 = 70 \) (this appears again)
- \( 1 \times 1 = 1 \) (this appears again)
- \( 7 \times \frac{1}{10} = 0.7 \)

2. **Add up all the values**:
\[
8000 + 400 + 70 + 1 + 70 + 1 + 0.7
\]

3. **Combine the numbers step by step**:
- \( 8000 + 400 = 8400 \)
- \( 8400 + 70 = 8470 \)
- \( 8470 + 1 = 8471 \)
- \( 8471 + 70 = 8541 \)
- \( 8541 + 1 = 8542 \)
- \( 8542 + 0.7 = 8542.7 \)

The final result is:

\[
\boxed{8542.7}
\]