ГДЗ Математика 7 клас Істер (2024)

Обчисліть 1) 0,257 ∙ 47 = (0,25 ∙ 4)7 = 1; 2) (1/7)5 ∙ 145 = (1/7 ∙ 14)5 = 25 = 32; 3) (11/8)9 ∙ (8/9)10 = (9/8)9 ∙ (8/9)9 ∙ 8/9 = (9/8 ∙ 8/9)9 ∙ 8/9 = 8/9; 4) 1,57 ∙ (2/3)9 = (3/2)7 ∙ (2/3)7 ∙ (2/3)2 = (3/2 ∙ 2/3)7 ∙ (2/3)2 = 4/9;