=5.8x(1-0.1)+0.58=5.8-0.58+0.58=5.8望采纳
可以这样算:(9.5-3.7)×9.9+0.58=5.8×9.9+0.58=0.58×99+0.58=0.58×(99+1)=0.58×100=58
简算:(9.5-3.7)*9.9+0.58=5.8*9.9+5.8*0.1=5.8*(9/9+0.1)=5.8*10=58