Вправи: 167

167. Обчисліть

a) (–57)¹² • (–75)¹⁴ = (–57 • (–74))¹² • (–75)² = 1 • 4925 = 4925;

б) 7¹⁵ • (–17)¹⁶ = (7 • (–17))¹⁵ • (–17) = (–1)¹⁵ • (–17) = 17;

в) (23)¹⁰ • (32)¹¹ = (23 • 32)¹⁰ • 32 = 1¹⁰ • 32 = 112;

г) (–0,4)⁸ • З⁴ • (–2,5)⁸ = (–0,4 • (–2,5))⁸ • З⁴ = 1⁸ • 81 = 81;

ґ) 0,2⁷ • 0,3² • 5⁷ = (0,2 • 5)⁷ • 0,09 = 1⁷ • 0,09 = 0,09;

д) 25¹⁰ • 2⁸ • 0,04¹⁰ = (25 • 0,04)¹⁰ • 256 = 1¹⁰ • 2⁸ = 256.