概率标尺

理解概率是在从0（不可能）到1（必然）的标尺上的度量；能够使用很可能、不大可能、必然、不可能等概率语言。

Understand probability as a measure on a scale from 0 (impossible) to 1 (certain); use the language of probability including likely, unlikely, certain, and impossible

学习证据 / Evidence

• 将日常事件放在0到1的概率标尺上，并说明理由
• 解释为什么公平的六面骰子每个数字出现的概率都是1/6
• 区分等可能结果（如公平硬币）与不等可能结果（如不均匀转盘）

• Place everyday events on a 0-to-1 probability scale with justification
• Explain why a fair six-sided die gives each number a probability of 1/6
• Distinguish between equally likely outcomes (fair coin) and unequally likely outcomes (biased spinner)

评估问题 / Assessment

{{name}}能解释概率从0（不可能）到1（必然），将事件以数字放在这个标尺上，并判断一个游戏是否公平吗？

Can {{name}} explain that probability goes from 0 (impossible) to 1 (certain), place events on that scale as numbers, and tell you whether a game is fair or not?