÷3=
×15=
1+2%=
+ × =
2- =
×75%=
×4× =
×9÷ ×9=
-(-)=
1.25×3.2×0.25=
0.06×1.7=
1.6÷=
×6÷×6=
1÷1%=
6--=
5×÷5×
>>>>
0.08公顷=平方米。