数学是人类生活的工具。对数学的认识不仅要从数学家关于本质的观点去领悟,更要从数学活动的本身实践中去体验。数学发展的动力不仅要从历史的角度考验,更要从数学与人和现实生活联系中去寻找。这充分说明了数 Mathematics is a tool of human life. Understanding mathematics should not only be understood from the point of view of mathematicians on the nature, but also from the practice of mathematical activities to experience. The motivation for the development of mathematics not only needs to be tested from a historical perspective, but also needs to be found in the connection between mathematics and people and the real life. This fully explains the number