Answer: You must be saying ? - 5 = 1.
The answer is 6.
Real World Situation:
If Tom has 1 cookie, then Michael gave 5 cookies to Tom. Tom has ? cookies now.
How many cookies does Tom have in total?
Step 1: Write out your problem.
? - 5 = 1
Step 2: Use your numbers given and then use the operation which is Subtraction, but go the opposite.
1 + 5 = 6.
So, your answer is 6. (Let me know if I made a mistake.)