Ответ:\(42+6=48\);\(31+9=40\);\(25+7=32\);\(78-7=71\);\(60-3=57\);\(54-6=48\);\(70-40-9=30-9=21\);\(48-(13-5)=48-8=40\);\(37+3-10=40-10=30\).Ответ: 48; 40; 32; 71; 57; 48; 21; 40; 30.