- Calculating the number of days in a year
- Understanding the concept of time and how it is measured
- Calculating the age difference between the two main characters
- Understanding the concept of percentages when the character talks about his chances of survival
- Calculating the amount of time the character has left to live based on the given information
Continued development can include exploring the concept of time further by creating a timeline of important events in the child's life or researching the history of timekeeping. Additionally, practicing calculating percentages in real-life situations such as shopping or budgeting can strengthen the child's understanding of the concept.