a) 2 × 10⁶ / 3 × 10⁴ = 2/3 × 10⁶⁻⁴ = 2/3 × 10²
b) 3 × 10⁵ × 2 ×10⁻⁴ / 9 × 10² = 3×2/9 × 10⁵⁻⁴⁻² = 6/9 × 10⁻¹
c) 5 × 10⁵ × 0.7 × 10⁻⁸ / 2.1 × 10⁻³ = 5×0.7/2.1 ×10⁵⁻⁸⁺³ = 3.5/2.1 ×10⁰
d) 16 × 10¹ × 2 / (10³)² × 10⁻⁶ × 30 = 32/30 × 10⁻¹⁺³⁶ = 32/30 × 10³⁵
