Write each of the following as decimals `:`
Two tens and nine-tenths

Answer

To convert "Two tens and nine-tenths" into a decimal, follow these steps:

### Step-by-Step Solution:

1. **Identify the components**:
- "Two tens" means 2 multiplied by 10.
- "Nine-tenths" means 9 divided by 10 or 0.9.

2. **Calculate the value of Two Tens**:
- Multiply 2 by 10:
\[ 2 \times 10 = 20 \]

3. **Convert Nine-Tenths to Decimal**:
- Nine-tenths can be expressed as:
\[ 9 \div 10 = 0.9 \]

4. **Add the two values together**:
- Now, add the value of Two Tens (20) and Nine-Tenths (0.9):
\[ 20 + 0.9 = 20.9 \]

5. **Final Result**:
- Therefore, "Two tens and nine-tenths" as a decimal is:
\[ 20.9 \]