Learning mathematics should not only solve problems correctly, but also make no mistakes in the specific problem-solving process.

A pensioner went home after minor surgery in the hospital. Two weeks later, she received a bill from the hospital for $63,440. When she saw such a huge number, she had a heart attack and fell to the ground dead. Later, someone checked with the hospital, and it turned out that the computer misplaced the decimal point, but in fact she only had to pay $63.44.

A wrong decimal point will actually kill a person. As Newton said, "In mathematics, the smallest error can't be ignored.

Mathematical magician

One day, a mental arithmetic contest was held. The performer is a woman, and her name is A. On that day, she will compete with an advanced electronic computer with amazing mental arithmetic ability.

The staff writes a large number of 20 1 bit and finds the 23rd root of this number. As a result, A reported the correct answer to the audience in 50 seconds. In order to get the same answer, the computer must input 20 thousand instructions and then calculate, which takes much more time than A.

This anecdote caused a sensation in the world, and A was called "Mathematical Magician".