①1.8+2.2=
②3.3﹣0.33=
③0.16÷0.4×2.5=
④0.7÷3.6=
⑤2.4×50=
⑥10×3.8﹣3.8=
⑦0.5×0.5=
⑧12.1÷0.01=
⑨2.7×0.3÷2.7×0.3=