列式:60÷480
列式:(15﹣5)÷
① x﹣ x=2.4
②40%x﹣18=6
③0.3:x=7:3.5
100﹣27.5= += 90×= 0.72÷0.6=
1.25×0.8= ÷75%= 96×65%+96×35%= 12÷×=