Today, I went to the supermarket to buy things, such as drinks 4 yuan/bottle, chicken legs 8 yuan/piece, hamburgers 7 yuan/piece, bread 2.5 yuan/piece, instant noodles 3 yuan/bag. I asked my aunt for a few dollars and said, "A ***20 dollars." I took out 20 yuan, decided to go to the supermarket, calculated the price, and said, "No" 4+8+7+o.5+3=22.5 (yuan). Aunt 2.5 yuan was omitted, and I went back to the supermarket to give it to Aunt 2.5 yuan, who said, "You are an honest young man!" Mathematics can make me understand the truth of being a man. I'm so happy.