(i) 360000 written in standard form is 3.6 × 10⁵

360000 = 36 × 10⁴ = 3.6 × 10 × 10⁴ = 3.6 × 10⁽¹⁺⁴⁾ = 3.6 × 10⁵

(ii) 0.0000123 written in standard form is 1.23 × 10^-5

0.0000123 =

= 1.23 × 10^(2-7) = 1.23 × 10^-5

(iii)

(iv) 3 × 10^-3 in usual form is 0.003

3 × 10^-3 = = 0.003

(v) 5.32 × 10^-4 in usual form is 0.000532

5.32 × 10^-4 = = 0.000532