Ответ: $$17 + 7 = 24$$ $$24 + 9 = 33$$ $$47 - 9 = 38$$ $$41 - 3 = 38$$ $$60 - 24 = 36$$ $$70 - 53 = 17$$ $$90 - (32 + 8) = 90 - 40 = 50$$ $$70 + (60 - 40) = 70 + 20 = 90$$