Ответ:\(11\cdot0.2=2.2\).\(1\cdot0.1=0.1\).\(39\cdot0.01=0.39\).\(31\cdot0.4=12.4\).\(0.5\cdot48=24\).Ответ: 2,2; 0,1; 0,39; 12,4; 24.