Answer :
- Rewrite the expression as $9 \times 99 + 9$.
- Calculate $9 \times 99 = 891$.
- Add 9 to the result: $891 + 9 = 900$.
- The final answer is $\boxed{900}$.
### Explanation
1. Problem Analysis
We need to find the sum of nine 99s and one 9. This can be written as $99+99+99+99+99+99+99+99+99+9$.
2. Rewriting the Expression
We can rewrite the expression as $9 \times 99 + 9$. This simplifies the calculation.
3. Multiplication
First, let's calculate $9 \times 99$. This equals 891.
4. Addition
Now, we add 9 to the result: $891 + 9 = 900$.
5. Final Answer
Therefore, the sum of nine 99s and one 9 is 900.
### Examples
Imagine you're collecting donations for a charity. Nine people donate $99 each, and one person donates $9. To find the total amount collected, you can use the same calculation: $9 \times 99 + 9 = 900$. So, the charity collects a total of $900.
- Calculate $9 \times 99 = 891$.
- Add 9 to the result: $891 + 9 = 900$.
- The final answer is $\boxed{900}$.
### Explanation
1. Problem Analysis
We need to find the sum of nine 99s and one 9. This can be written as $99+99+99+99+99+99+99+99+99+9$.
2. Rewriting the Expression
We can rewrite the expression as $9 \times 99 + 9$. This simplifies the calculation.
3. Multiplication
First, let's calculate $9 \times 99$. This equals 891.
4. Addition
Now, we add 9 to the result: $891 + 9 = 900$.
5. Final Answer
Therefore, the sum of nine 99s and one 9 is 900.
### Examples
Imagine you're collecting donations for a charity. Nine people donate $99 each, and one person donates $9. To find the total amount collected, you can use the same calculation: $9 \times 99 + 9 = 900$. So, the charity collects a total of $900.
