0.52= 4%×25= ÷ = 1+1÷9=
0.67+0.32= 0÷25×99= - × = 0.15÷100=
10.1-1= 20- = 6.35+3.65×0= 10 ×11=
0.49÷0.7=
÷130%=
=
16×12.5% =
2-=
5%×(1-)=
3÷-÷3=
:10%(求比值)