Find the cubes of :
`2.5`

Answer

To find the cube of \(2.5\), we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Cube Calculation**:
The cube of a number \(x\) is calculated as \(x \times x \times x\). For our case, we need to calculate \(2.5 \times 2.5 \times 2.5\).

2. **Calculate \(2.5 \times 2.5\)**:
\[ 2.5 \times 2.5 = 6.25 \]
- To do this, you can think of it as \(25 \times 25\) divided by \(100\) (since \(2.5\) is \(25/10\)):
\[ 25 \times 25 = 625 \quad \text{and} \quad 625 \div 100 = 6.25 \]

3. **Multiply the Result by \(2.5\)**:
Now we need to multiply \(6.25\) by \(2.5\):
\[ 6.25 \times 2.5 \]
- We can break this down:
\[ 6.25 \times 2.5 = 6.25 \times \frac{25}{10} = \frac{6.25 \times 25}{10} \]

4. **Calculate \(6.25 \times 25\)**:
\[ 6.25 \times 25 = 156.25 \]
- To do this, you can multiply directly:
\[ 6.25 \times 25 = 156.25 \]

5. **Adjust for the Decimal**:
Since we divided by \(10\) in the previous step, we need to adjust the decimal point:
\[ \frac{156.25}{10} = 15.625 \]

6. **Final Result**:
Therefore, the cube of \(2.5\) is:
\[ 2.5^3 = 15.625 \]

### Final Answer:
The cube of \(2.5\) is \(15.625\).

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