You saw a shirt for $97.
You didn't have the cash, so you borrowed $50 from your mom and $50 from your dad = $100.
You bought the shirt and had $3 change.
You gave your dad $1 and your mom $1 and kept the other $1 for yourself.
Now you owe your mom $49 and your dad $49.
$49 + $49 = $98
+ your $1 = $99.
Where is the missing $1?
You didn't have the cash, so you borrowed $50 from your mom and $50 from your dad = $100.
You bought the shirt and had $3 change.
You gave your dad $1 and your mom $1 and kept the other $1 for yourself.
Now you owe your mom $49 and your dad $49.
$49 + $49 = $98
+ your $1 = $99.
Where is the missing $1?