1. When shopping in the supermarket, we need to calculate the total price of the purchased goods. This is an example of addition. We bought a bottle of water 10 yuan and a bag of bread 15 yuan. The total price is 10+ 15=25.

2. When we need to calculate the total duration of two time periods, we can also use the addition operation. We need to count the time spent reading in the morning and exercising in the afternoon. We need to study for 3 hours in the morning and exercise for 2 hours in the afternoon, with a total duration of 3+2=5 hours.