Вправи: 454

454. Спростіть вираз:

1) 125b2 : 16a15b = 12a • 15b5b2 • 16a = 94b;

2) –7m2n2 : 21mn3 = –7m2n321n2m = –mn3;

3) –5a34b2 : (–10a²) = 5a34b2 • 10a2 = a8b2;

4) 20m²n : (–4m3p) = –20m2np4m3 = –5npm;

5) 5c29m3 : 25c381m = 5c2 • 81m9m3 • 25c3 = 95cm2;

6) –22x239a : (–33x326a4) = 22x2 • 26a439a • 33x3 = 4a39x.