Question

Justin's hair is 3 1/4 inches long. How long will it be in 2 months if it grows 1/2 inch each month? Which method will NOT give the correct number of inches?

Answer 1

I know this is super late but I want to help others who struggle on this.

Answer:

Multiply 3 1/4 × 2, and then add 1/2.

This method does NOT give the correct number of inches.