1. Выполни умножение: 3 · 1; 3 · 2; 3 · 3; 3 · 4; 3 · 5; 3 · 6; 3 · 7; 3 · 8; 3 · 9; 3 · 10; 1 · 3; 3 · 5; 8 · 3; 2 · 3; 3 · 4; 9 · 3; 3 · 6; 7 · 3; 10 · 3; 3 · 3.

\(3\cdot1=3\), \(3\cdot2=6\), \(3\cdot3=9\), \(3\cdot4=12\), \(3\cdot5=15\), \(3\cdot6=18\), \(3\cdot7=21\), \(3\cdot8=24\), \(3\cdot9=27\), \(3\cdot10=30\); \(1\cdot3=3\), \(3\cdot5=15\), \(8\cdot3=24\), \(2\cdot3=6\), \(3\cdot4=12\), \(9\cdot3=27\), \(3\cdot6=18\), \(7\cdot3=21\), \(10\cdot3=30\), \(3\cdot3=9\).