M3.7.6 For the adult
The language of chance
A bag holds 1 black bead and 9 white beads. How likely is it that you pick black?
What this chapter teaches
A probability is a number from 0 to 1. Impossible is 0, certain is 1 and an even chance is 0.5. Unlikely events sit between 0 and 0.5, and likely events between 0.5 and 1.
Three questions to ask
There is no one right wording. Listen for the idea.
- Where on a line from 0 to 1 would you put "a dice shows 7"?
- Why can a probability never be 1.2?
- How do you write one quarter as a decimal?
After the chapter, the learner can
- Place events on a scale from impossible to certain
- Write a probability as a fraction or decimal from 0 to 1
What they copy into their notebook
Probability is a number from 0 to 1. Impossible is 0. Certain is 1. Even chance is 0.5. Unlikely is below 0.5. Likely is above 0.5. Write it as a fraction or a decimal.