?$解:(1)3×{10}^{8}×3×{10}^{8}=9×{10}^{16}(米)$?
?$9×{10}^{16}米=9×{10}^{13}千米$?
?$答:1光年約是9×{10}^{13}千米$?
?$(2)100000×9×{10}^{13}=9×{10}^{18}(千米)$?
?$答:約是9×{10}^{18}千米$?
?$(3)3×{10}^{8}m/s=1.08×{10}^{9}km/h$?
?$1.08×{10}^{9}÷1000=1.08×{10}^{6}$?
?$答:光的速度是這架飛機(jī)速度的1.08×{10}^{6}倍$?