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4.2÷0.07=
0.33-0.23=
=
×÷ ×=
4.6+54=
+×2=
1÷30%=
4÷-÷4=
3×23%=
0.2÷20%=
45.5%×10=
3.14×8=
+=
×=
1-=
+2=
×0=
-=
0.333
40%+1.5=
1-25%=
45÷(1-25%)=
60÷20%=
30×(1+20%)=