(12分之5+25分之7)×12×15

(12分之5+25分之7)×12×15简便计算
2024-11-07 04:51:46
推荐回答(1个)
回答1:

12×(12分之5+25分之7)×25 =5/12×12×25+7/25×12×25 =5×25+7×12 =125+84 =209