7.28×0.1+0.5×72.8+0.49×728求简算

问题描述:

7.28×0.1+0.5×72.8+0.49×728求简算

7.28×0.1+0.5×72.8+0.49×728
=7.28×﹙0.1+5+49﹚
=7.28×54.1
=393.848