能巧算的要巧算:2.5*1.9+25*0.71+0.25 *1.0

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/17 09:51:20
能巧算的要巧算:2.5*1.9+25*0.71+0.25*1.0能巧算的要巧算:2.5*1.9+25*0.71+0.25*1.0能巧算的要巧算:2.5*1.9+25*0.71+0.25*1.02.5*

能巧算的要巧算:2.5*1.9+25*0.71+0.25 *1.0
能巧算的要巧算:2.5*1.9+25*0.71+0.25 *1.0

能巧算的要巧算:2.5*1.9+25*0.71+0.25 *1.0
2.5*1.9+25*0.71+0.25 *1.0 =25*0.19+25*0.71+0.25=25*(0.19+0.71)+0.25=25*0.9+0.25=25-2.5+0.25=22.75