The 0-to-1 Probability Scale
Understand probability as a measure expressed as a number between 0 (impossible) and 1 (certain); place events on the probability scale; express probabilities as fractions, decimals, and percentages
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Check understanding
- Place events on a number line from 0 (impossible) to 1 (certain), expressing positions as fractions or decimals
- Explain that a probability of 0.5 means 'even chance' and connect this to the informal word 'likely'
- Convert between informal language ('very unlikely') and a numerical position on the 0-to-1 scale
“Can your child write the same probability as a fraction, a decimal, and a percentage — for example, knowing that an even chance is ½, 0.5, and 50%?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Probability
- Age range
- Ages 10–11