2/5乘60%+19/20乘2/5+19/20乘60%

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/27 22:47:26
2/5乘60%+19/20乘2/5+19/20乘60%2/5乘60%+19/20乘2/5+19/20乘60%2/5乘60%+19/20乘2/5+19/20乘60%题目就是2/5×3/5+19/20×2

2/5乘60%+19/20乘2/5+19/20乘60%
2/5乘60%+19/20乘2/5+19/20乘60%

2/5乘60%+19/20乘2/5+19/20乘60%
题目就是2/5×3/5+19/20×2/5+19/20×3/5 =2/5×3/5+19/20×(2/5+3/5) =6/25+19/20 取分母公倍数100 =6×4/100+19×5/100 =(24+95)/100 =1.19