4. Вычисли: 90 · 6; 8 · 15; 240 · 3; 48 : 2; 60 : 5; 320 : 8; 96 : 16; 270 : 90; 850 : 17.

\(90\cdot6=540\); \(8\cdot15=120\); \(240\cdot3=720\); \(48:2=24\); \(60:5=12\); \(320:8=40\); \(96:16=6\); \(270:90=3\); \(850:17=50\).