-=
×=
2÷=
÷6=
2×=
:=
8.4÷4.2=
10÷1%=
1÷3×=
0÷×14=
1+x=1.6 25%x-9%x=48 3.2:x=:
2.4-60%=
0.22=
=
0.23+177%=
1-1÷10=
:0.6(求比值)
1.2米:36厘米(化简比)
7+66.3= ÷ = × ÷ = 8.9×11-8.9=
14÷ = ÷20%= ( + )×20= + × =
∶( )=0.5
0.04∶1=( )∶50
105665500≈万
81122300≈万