科學記數法將下列數值寫成10n 。100 000 =10 000 =1 000 =100 =10 =1 =0.1 =0.01 =0.001 =10510410310210110010-110-210-31 000 = 10 × 10 × 10 = 10310 000 = 10×1000 = 10×103 = 104科學記數法將下列數值寫成科學記數法 d × 10n 。(a) 400 000 = 4 × 100 000 = 4 × 10