a)
a×b - (2,4 × 10¹⁵) × (2 × 10⁷) = 4,8 × 10²²
a/b - 2,4 × 10¹⁵/2×10⁷ = 1,2 × 10⁸
b)
a×b - (6 × 10²³) × (5 × 10¹⁹) = 3 × 10⁴³
a/b - 6 × 10²³/5 × 10¹⁹ = 1,2 × 10⁴
c)
a×b - (1,2 × 10²⁰) × (4 × 10¹⁰) = 4,8 × 10³⁰
a/b - 1,2 × 10²⁰/4 × 10¹⁰ = 3 × 10⁹
