Mathematics
Probability
Representational
9–10 yrs
Probability as a Fraction
用分数表示概率
Description
Describe the probability of simple equally-likely outcomes using unit fractions: the probability of rolling a 6 on a fair die is 1/6, flipping heads is 1/2, picking one specific colour from three equally represented colours is 1/3; place these fractional probabilities on a 0-to-1 probability scale
Mastery Evidence
- State that the probability of rolling a 6 on a fair die is 1/6 and explain why
- Express the probability of picking a red card from a standard deck as 26/52 or 1/2
- Write the probability of a simple event as a fraction: favourable outcomes over total outcomes
Assessment Prompt
If your child flips a fair coin, do they know the probability of getting heads is 1/2 — and can they express similar simple probabilities as fractions and place them on a 0-to-1 scale?
