Little Johnny gets an F in math Check 1st comment

He came home and told his dad, “I got an F in math today.”
His dad asked, “What happened?”
Johnny explained, “The teacher asked, ‘What’s 3 times 2?’ I said 6.”
His dad replied, “That’s correct.”
Johnny continued, “Then she asked, ‘What’s 2 times 3?’”
His dad shouted, “What’s the difference?”
Johnny grinned, “That’s what I said!