Вправи 301 - 400 » 357-358

25 ∙ х = 250 х = 250 : 25 х = 25 дес. : 25 х = 1 дес. х = 10 х ∙ 24 = 72 х = 72 : 24 х = (48 + 24) : 24 х = 2 + 1 х = 3 90 : х = 15 х = 90 : 15 х = (45 + 45) : 15 х = 3 + 3 х = 6 358. (4 ∙ 8) + 9 = 41 (66 – 36) : 5 = 6 (23 – 3) – 2 = 18 (63 : 7) : 3 = 3 (7 ∙ 5) + 25 = 60 (56 : 7) ∙ 4 = 32