1. Alexa, who is nine years old, wanted to calculate her step-brother's age when she was
born. Her step-brother, Aaron, is 24. Here is Alexa's calculation:
24 - 5 = 18
18 - 4 = 14
Alexa concludes that Aaron was 14 years old when she was born. Is her work accurate?
Answer:
If not, recommend a strategy that might help Alexa solve more accurately. Show your
strategy in the box below. Circle Aaron's age when Alexa was born.