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