Ответ:\(75-24=75-20-4=55-4=51\).\(38+15=38+10+5=48+5=53\).\(43-17=43-10-7=33-7=26\).\(65-15=65-10-5=55-5=50\).\(80-22=80-20-2=60-2=58\).Ответ: 51; 53; 26; 50; 58.