The math teacher is from the city. He has a prejudice that rural children are not as clever as urban children. However, he is very strict with his children's study. He hates students who don't pay attention in class and love to make small moves. He often beats them with a whip. Children like to listen to his class because he often talks about some very interesting things.
One day, he worked out an arithmetic problem. He said, "You calculate, 1 plus 2 plus 3, until 100?" Anyone who can't figure it out is not allowed to go home for dinner. "Say that finish, he sat in a chair, with eyes patrolling the students at my desk calculus.
Less than a minute later, little Gauss stood up with a small slate in his hand and said, "Teacher, I have worked it out ..."
Before Gauss finished, the teacher said impatiently, "No! Recalculate! "
Little gauss quickly checked it and said loudly, "yes, teacher!" " "Say that finish, he stepped down from his seat and put the small slate in front of the teacher.
The teacher looked down and was surprised to see "5050" written on it. He couldn't believe such a complicated math problem that an 8-year-old child worked out the correct number in less than a minute. You know, it took him more than an hour and three times to get the question right. He suspected that others had asked little Gauss to work out the problem before. Just ask little Gauss, "How did you work it out?" Little Gauss replied, "I didn't add them one by one in the order of 1, 2, 3." Teacher, you see, the sum of the two numbers at the beginning and the end of one is the same: 1 plus 100 is1kloc-0/,2 plus 99 hours is1kloc-0/,and 3 plus 98 is also1. ...
Little Gauss's answer surprised the teacher. Because this is the first time he knows this algorithm. He looked at little Gauss in surprise, as if he had just met the son of a ragged bricklayer.
Soon, the teacher specially bought a math book for Xiao Gauss, encouraged him to continue his efforts, and recommended Xiao Gauss to the local education bureau for free education. Later, little Gauss became a world-famous mathematician. In memory of him, people called his calculation method "Gauss Theorem".