““If you had a dollar, “quizzed the teacher, “and you asked your father for another dollar and fifty cents, how much money would you have?”
“One dollar. “answered little Johnny.
“You don’t know your basic math. “said the teacher, shaking her head, disappointed.
Little Johnny shook his head too, “You don’t know my daddy. “
This joke is included in the Black Book of Jokes. You can order it from here.