✨ ベストアンサー ✨
10^-3 = 10的負3次方
2.4 × 10^-3 (如果左邊除以10,則右邊就要乘以10,反之亦同。)
= 24 × 10^-4
= 0.24 × 10^-2
3.46 × 10^-8 - 1.35 × 10^-9
= 346 × 10^-10 - 13.5 × 10^-10
= (346 - 13.5) × 10^-10
3.46 × 10^-9 - 1.35 × 10^-10
= 34.6 × 10^-10 - 1.35 × 10^-10
= (34.6 - 1.35) × 10^-10
2.46 × 10^-8 - 1.35 × 10^-9
= 246 × 10^-10 - 13.5 × 10^-10
= (246 - 13.5) × 10^-10
2.46 × 10^-9 - 1.35 × 10^-10
= 24.6 × 10^-10 - 1.35 × 10^-10
= (24.6 - 1.35) × 10^-10
或是全部換成負8或負9次方也可以
謝謝你!