203.
(10⁸)² * 100⁻⁶ = 10¹⁶ *(10²)⁻⁶ = 10¹⁶ * 10⁻¹² = 10⁴=10000
204.
(10⁻¹⁰ * 100⁶)⁻¹ = (10⁻¹⁰ * (10²)⁶)⁻¹ = (10⁻¹⁰ * 10¹²)⁻¹ = (10²)⁻¹ = 100⁻¹ = 1/100=0,01
205.
6⁻⁴ = (2*3)⁻⁴ = 2⁻⁴ * 3⁻⁴ = 2⁻⁴⁻(⁻⁶) =2⁻⁴⁺⁶ =2²=4
2⁻⁶ * 3⁻⁴ 2⁻⁶ * 3⁻⁴ 2⁻⁶ * 3⁻⁴
207.
3⁻² * 5⁻³ = 3⁻² * 5⁻³ = 3⁻² * 5⁻³ = 3⁻²⁻(⁻³) = 3⁻²⁺³ = 3
15⁻³ (3*5)⁻³ 3⁻³ * 5⁻³