今天，我和媽媽去市場買菜。媽媽說買點什么呢，我說牛肉啊，于是，我跟媽媽來到牛肉店，買了一塊牛肉一稱16元。在阿姨幫我們切牛肉時，媽媽問我該怎么付錢，我想了想說你付一張10元一張5 元一張1元，媽媽說對呀，可如果我付20元那該找回幾元，我說，20減16等于4元。于是，我們高興地回家了。

Today, my mother and I went to the market to buy vegetables. Mom said to buy something, I said beef, so I went to the beef shop with mom and bought a piece of beef for 16 yuan. When my aunt helped us cut the beef, my mother asked me how to pay. I thought about it and wanted to say that you pay 10 yuan a piece, 5 yuan a piece and 1 yuan a piece. My mother said yes, but if I pay 20 yuan, I should get back several yuan. I said that 20 minus 16 is 4 yuan. So we went home happily.