数轴上的数
Numbers on a number line
理解不等式是比较表达式的陈述，能在数轴上表示解集，并运用与等式相同的逆运算方法解决简单的一元一次不等式。
Understand inequalities as statements comparing expressions, represent solutions on a number line, and solve simple linear inequalities using the same inverse-operation methods as equations
学习证据 / Evidence
- 根据文字条件写出不等式（例如：“至少为12”可写成 x ≥ 12）
- 在数轴上用空心圆圈或实心圆圈表示不等式的解集。
- 解一个一步或两步不等式，例如 3x + 1 < 10。
- Write an inequality from a worded constraint (e.g., 'must be at least 12' → x ≥ 12)
- Represent the solution set of an inequality on a number line with open or closed circles
- Solve a one-step or two-step inequality such as 3x + 1 < 10
评估问题 / Assessment
{{name}}能求解像 2x + 1 < 9 这样的不等式，在数轴上表示出答案，并解释所有这些解有什么共同点吗？
Can {{name}} solve an inequality like 2x + 1 < 9, show the answer on a number line, and explain what all the solutions have in common?