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数的发展是中学代数的基础,没有这个基础,其他的内容都无法学习.在初一,首先要学习的新数就是负数,把数发展到有理数的范围.一、为什么要学习有理数学习有理数是生活实际的需要,人们在非洲亚丁湾沿岸,
The development of numbers is the foundation of middle school algebra. Without this foundation, other contents cannot be studied. In the first year, the first new number to learn is negative numbers, and the number is developed to the range of rational numbers. First, why should we learn rational numbers? The actual needs of life, people are on the coast of the Gulf of Aden, Africa.