(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 15:29:09
![(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?](/uploads/image/z/11397506-50-6.jpg?t=%28-3%2F5%29%C3%97%EF%BC%88-12%EF%BC%89%2B0.27%C3%975%2F9%2B%EF%BC%88-12%EF%BC%89%C3%97%EF%BC%88-2%2F5%EF%BC%89%2B4%2F9%C3%970.27%3D%3F)
(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=?
(-3/5)×(-12)+0.27×5/9+(-12)×(-2/5)+4/9×0.27=(-3/5)×(-12)+(-12)×(-2/5)+0.27×5/9+4/9×0.27=-12+027=-11.73
=(-12)*(-3/5-2/5)+0.27*(5/9+4/9)=12+0.27=12.27
=(-0.6)×(-12)+0.27×0.56+(-12)×(-0.4)+0.45×0.27
=7.2+0.1512+4.8+0.1215
=7.3502+4.8+0.1215
=12.1502+0.1215
=12.2707