星期天,妈妈给我和好朋友小婷出了这样一道题:“养鸡小组养了15只母鸡,2只公鸡,每只鸡平均每个月下蛋25个,一个月共下蛋多少个?”我一看题目,就信心十足地拿起笔写下了式子:25×15=375(个)。小婷连忙说“:不对,不对!式子应该这么列:25×(15+2)=425(个)。”我和小婷开始争论起来,争论的焦点就是:2只公鸡该不该算它们下蛋?我大 On Sunday, my mom gave me and my good friend Xiaoting a question like this: “The chicken raising group has 15 hens and 2 roosters. Each chicken averages 25 eggs a month. How many eggs a month? ”When I look at the subject, I pick up the pen with confidence and write down the formula: 25 × 15 = 375 (个). Xiaoting quickly said “: wrong, wrong! The formula should be so: 25 × (15 +2) = 425 (a).” I and Xiaoting began to argue, the focus of the debate is: 2 cocks should not The count them eggs? I am big