Write each of the as a decimal number:
`70+6+(7)/(10)+(9)/(1000)`

Answer

To convert the expression \(70 + 6 + \frac{7}{10} + \frac{9}{1000}\) into a decimal number, we can follow these steps:

### Step-by-Step Solution:

1. **Separate the Whole Numbers and Fractions**:
- We have two whole numbers: 70 and 6.
- We also have two fractions: \(\frac{7}{10}\) and \(\frac{9}{1000}\).

2. **Add the Whole Numbers**:
- First, add the whole numbers together:
\[ 70 + 6 = 76 \]

3. **Convert the Fractions to Decimals**:
- Convert \(\frac{7}{10}\) to decimal:
\[ \frac{7}{10} = 0.7 \]
- Convert \(\frac{9}{1000}\) to decimal:
\[ \frac{9}{1000} = 0.009 \]

4. **Add the Decimal Values**:
- Now, add the decimal values to the sum of the whole numbers:
\[ 76 + 0.7 + 0.009 \]

5. **Align the Decimals for Addition**:
- To add, we can write 76 as 76.000 to align the decimal points:
\[ 76.000 + 0.700 + 0.009 \]

6. **Perform the Addition**:
- Start adding from the right:
- \(0 + 0 + 9 = 9\)
- \(0 + 0 + 0 = 0\)
- \(0 + 7 + 0 = 7\)
- \(76 + 0 + 0 = 76\)
- Therefore, the total is:
\[ 76.709 \]

### Final Answer:
The expression \(70 + 6 + \frac{7}{10} + \frac{9}{1000}\) as a decimal number is:
\[ \boxed{76.709} \]