数轴上的数
Numbers on a number line
理解有理数的绝对值是它在数轴上到零的距离；将绝对值解释为现实情境中的量值；区分绝对值比较与大小排序表述。
Understand the absolute value of a rational number as its distance from zero on the number line; interpret absolute value as magnitude in real-world contexts; distinguish absolute value comparisons from ordering statements
学习证据 / Evidence
- 将绝对值定义为数轴上到零的距离
- 计算正负有理数的绝对值
- 在现实情境中区分比较绝对值与比较带符号数
- Define absolute value as distance from zero on a number line
- Calculate the absolute value of positive and negative rational numbers
- Distinguish between comparing absolute values and comparing signed numbers in real-world contexts
评估问题 / Assessment
{{name}}能否说出−7的绝对值是7——因为它在数轴上距离零有7步，与方向无关——并运用这一概念来比较距离？
Can {{name}} tell you that the absolute value of −7 is 7 — because it's 7 steps from zero on a number line regardless of direction — and use this idea to compare distances?