Once, Brother Qiang came to my house with Lele. I said to Brother Qiang: "How about I teach your son how to shop?" Brother Qiang nodded and said: "That's great, he doesn't have a concept of the value of money yet." I said: "Give him some money, let me make him buy something from me."
Brother Qiang gave Lele 10 yuan. I told Lele: "You have to pay to eat anything at Uncle's house." Lele asked: "How much are cookies?"
"One yuan," I made up an easy number. Lele handed me 10 yuan, and I said: "How much change should I give you?"
"9 yuan." His son was pretty smart.
This way, I and his son simulated shopping N times. To test him, Brother Qiang sent Lele to the convenience store to buy a bag of cookies. I and Brother Qiang followed closely behind. As soon as he entered the store, his son asked the boss: "How much are cookies?"
"2.5 yuan." Upon hearing this, Lele turned around and left, muttering: "Too expensive, only one yuan at uncle's house."