直接写出得数:①4.5×0.1= ②6.3÷0.7= ③12+1.2= ④2.5﹣1.6= ⑤200×0.04=⑥1÷0.25= ⑦5.5÷11= ⑧3.6÷0.09= ⑨7.5×0.4= ⑩0.25×4×9=