重点难点易混易错点剖析重点:根据不等式的基本性质解不等式,能解一元一次不等式和一元一次不等式组,利用数轴表示不等式(组)的解集,能用不等式(组)解决实际问题.难点:根据不等式的基本性质对不等式进行变形,在解决实际问题时如何正确列出不等 Key points are difficult to analyze and analyze the key points: According to the basic properties of inequalities, inequalities can be solved, one inequality inequalities and one inequality inequalities can be solved, and the inequality equations (groups) can be solved on the axis of numbers. Inequalities (groups) can be used to solve practical problems. Difficulties: According to the basic nature of inequality, inequality is deformed, and how to correctly list when solving practical problems