100×25%=
÷40%=
1-72%=
36%+64%=
80×(1+25%)=
60÷(1-40%)=
45×(1-20%)=
72÷(1+20%)=
①:
②0.07:0.9
③14:
④:
⑤3.6:4
⑥105:15
= = = = =
甲、乙两个圆的直径比是,周长比是,面积比是。
5x+5=25(解方程)