0.2÷0.01=
0.1÷10%=
1÷3×1÷3=
0.5×0.25×0.125=
÷7=
×75%=
×99+99× =
+ × =
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
□○□=□( )
口答:右边有( )只
口答:灰鸭子有( )只