What are the math jokes?

A statistician who has never taken care of his children reluctantly agreed to take care of four young and active children when his wife went shopping on Saturday afternoon. When his wife came home, he handed her a note that read: "Wipe your tears 1 1 time; Tie shoelaces 15 times; Blow toy balloons for each child five times, and the average life of each balloon is 10 second; Warning children not to cross the road 26 times; The child insisted on crossing the road 26 times; I want to do it again on Saturday. " That's right. Min Min: "How do you write 7+3= 10, 7+3= 1?" Baby: "I just didn't write 0 at the end!" " Min Min: "That's wrong! "The baby said," 0 doesn't mean anything. "In Wu Zetian's history class, the teacher asked," Who knows who Wu Zetian is? "Student:" Wu Zetian was a mathematician, and five days later she was a great mathematician who invented rounding. "Waiting for the bus" Dad, the No.4 bus is coming! " "Fool, that's not No.4, it's No.31!" "The teacher said, 3+ 1=4!" The little boy said confidently. The difference is that our teacher asked Axi in math class, "What's the difference between one-half and one-eighth?" Asi didn't answer. Teacher Fang said, "Think about it. If you had to choose half an orange or eight sixteenth oranges, which one would you choose? "Axi:" I must have half. " "Why? ""When the orange is divided into one sixteenth, a lot of orange juice is squeezed dry, don't you think so, teacher? "Mathematicians fall in love. Mathematicians and their girlfriends are walking in the park. His girlfriend asked him, "Do you really mind my freckles?" Mathematicians replied softly, "absolutely not! I was born to like dealing with decimal points. "Who is the meanest?" Tell me, who is the meanest person in the world? ""Mathematicians, of course. " "Why?" "They fight for every ounce! "What is pi? Mathematician: Pi is the ratio of circumference to diameter. Engineer: Pi is about 22/7. Computer programmer: Under double precision, Pi is 3. 14 1592653589. Nutritionist: You die-hard math minds, pie is a delicious and healthy dessert! In the Chinese composition class, the teacher assigned a 500-word composition. As soon as the bell rang, a student found that he had only written 250 words. He had a brainwave and wrote "the above content ×2" in the last line of the article. A few days later, the composition book was issued, and the position of the score suddenly appeared "80÷2". The multiplication table teacher found that there was a student named Mu (1+2+3) in the exercise book. The teacher asked, "Whose exercise book is this?" A student stood up and said, "It's mine! Teacher: "What's your name?" "Student:" Mulinsen! "Teacher:" Then how did you write your name like this? " Student: "I used multiplication and division!" " "In the morning 1 1 half past four, A is hungry and doesn't want to attend class. He sat in his seat, thinking about beef and bread. The math teacher found him absent-minded and asked him, "What would happen if the decimal number 1. 130 moved one place to the right?" A student replied without thinking, "there will be lunch!" " "