Вправи: 148

148. Виконайте дію:

1) a16m2 • 12m = a • 12m16m2 = 3a4m;

2) a³ • 7x3a2 = 7x3a3a2 = 7x3a1 = 7x³a;

3) –7y4x2 • 12xy² = –7y • 12xy24x2 = –21y3x;

4) 5cm⁴ • (–m15c) = –5cm4• m15c = –m53;

5) –5ab² • (–110ab) = 5ab210ab = b2;

6) 13c²d • 726c3d2 = 13c2d • 726c3d2 = 72cd.