Reversing/adding/subtracting 3-digit numbers

1. Select a number with different 1st and 3rd digits.
2. Reverse the digits.
3. Subtract the smaller digit from the larger.
4. Reverse the digits of this answer.
5. Add these two numbers.
6. Subtract a number from this sum.
7. The final answer will be 1089 minus whatever number you choose in step 6!

   Example:

1. For the last step you say to subtract 22.
2. The answer is: 1089 - 22 = 1067.

   See the pattern?

1. For the last step you say to subtract 101.
2. The answer is: 1089 - 101 = 988.

Each time, change the number you select for the last step - just select one that is easy to subtract from 1089. Then your answers will be immediate and correct.