=
÷0.3=
54π÷9+π=
km2 :公顷=
0.25× 80%=
0.52-0.42 =
3.6×()=
÷=
90%×90 =
56÷7% =
200÷20% =
0.6÷3% =
2000×3.15% =
0.72÷6% =
20×35% =
1.5÷50% =
70×(1-85%)=
15%+25%=
1-35%=
50×60%=
10÷5%=
40%×80%=
120÷20%=
150×24%=
3.5÷70%=