(浙江)求x的值 :12=:x x﹣0.15x=8.5 3.6:x=.
106×109
7÷23+11÷17+11÷23+15÷23+23÷17+17÷23+19÷23
(96×48×91)÷(32×24×13)
计算54+99×99+45
计算9+99+999+9999+99999