The arithmetic teacher had written 10.9 on the blackboard and had then rubbed out the decimal point to show the effect of multiplying this number by ten.
"Johnny," the teacher asked, "where is the decimal point now?"
"On the eraser!" came back the quick reply.
Little Johnny had left the house to meet his friends without asking his mother. Once he came home, his mother was not pleased.
"Johnny," she said, "if you wanted to go to the park with your friends, why didn't you come and ask me first?"
"Because," Johnny replied, "I wanted to go to the park with my friends."
Teacher: "Now Johnny, can you tell me some of your favorite numbers?"
Little Johnny: "541, 29, 623, 188, 769 and 40."
Teacher: "Very good, Johnny, now I would like you to add your favorite numbers together."
Little Johnny: "Uhm, uh... actually, a couple of numbers I really like are 4 and 1."
During dinner, Little Johnny's mother catches him feeding the dog under the table. "Johnny," she says sternly. "You know very well that you're not supposed to feed the dog at the table!"
"I'm sorry, Mom." Johnny replies.
"All is well," his mother replies. "Now, do you know why we have that rule in the house?"
Johnny muses for a moment, then replies, "I guess it's 'cause if the dog doesn't like the food I give him, the food'll get left on the floor and eventually rot."