How many numbers are there with:
8-digits

Answer

To find out how many 8-digit numbers there are, we can follow these steps:

### Step 1: Identify the maximum and minimum 8-digit numbers.
- The maximum 8-digit number is 99,999,999.
- The minimum 8-digit number is 10,000,000.

### Step 2: Calculate the total number of 8-digit numbers.
To find the total number of 8-digit numbers, we need to subtract the minimum 8-digit number from the maximum 8-digit number and then add 1 (to include both endpoints).

### Step 3: Perform the subtraction.
- Maximum 8-digit number: 99,999,999
- Minimum 8-digit number: 10,000,000

Now, we calculate:
\[ 99,999,999 - 10,000,000 = 89,999,999 \]

### Step 4: Add 1 to include both the minimum and maximum numbers.
Now we add 1 to the result from the previous step:
\[ 89,999,999 + 1 = 90,000,000 \]

### Conclusion:
Thus, the total number of 8-digit numbers is **90,000,000**.

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