15﹣0.3= 6﹣0.5= 2.13+14= 0.91+1.25= 10﹣0.76=0.567+4.44= 0.37+0.6= 7.46+2.54= 45.9+1=
(96×48×91)÷(32×24×13)
计算54+99×99+45
计算9+99+999+9999+99999
42:=x:
x-x=