①
②
③
④
⑤25%+
⑥
⑦6÷30%=
⑧×2.3×0=
⑨4×4²=
⑩3.14×6=
=
÷0.3=
54π÷9+π=
km2 :公顷=
0.25× 80%=
0.52-0.42 =
3.6×()=
÷=