Use the digits 0 1 2 3 4 5 6 7 only once to find the smallest answer possible in subtraction

smallest answer will come from subtracting the largest value from the smallest. So,

0 - 7654321

To find the smallest answer possible in subtraction using the digits 0, 1, 2, 3, 4, 5, 6, and 7 only once, follow these steps:

1. Start by arranging the digits in descending order: 7, 6, 5, 4, 3, 2, 1, 0.
2. Subtract the larger number from the smaller number in each iteration until you find the smallest possible answer.

For example:
- 7 - 6 = 1
- 1 - 5 (Since 7 is already used) = -4
- 4 - 3 = 1
- 1 - 2 (Since 4 is already used) = -1
- 0 - 1 = -1

Therefore, the smallest possible answer in subtraction using the digits 0, 1, 2, 3, 4, 5, 6, and 7 only once is -1.

To find the smallest answer possible in subtraction using the digits 0 1 2 3 4 5 6 7 only once, we need to consider the place value of each digit.

The first step is to arrange the digits in descending order to form the minuend. Since we want the smallest answer, the minuend should be the largest possible number using these digits: 76543210.

Next, we need to arrange the digits in ascending order to form the subtrahend. Since the subtrahend should be the smallest possible number using these digits, the digits should be in the order 01234567.

Now we can subtract the subtrahend from the minuend:

76543210
- 01234567

Performing the subtraction, we start from the rightmost column and subtract each digit column by column.

76543210
- 01234567
--------------
75308643

Therefore, the smallest answer possible in subtraction using the digits 0 1 2 3 4 5 6 7 only once is 75,308,643.