Ответ:Решение:\( (50 + 10) - 1 = 60 - 1 = 59 \)\( 80 - (46 + 4) = 80 - 50 = 30 \)\( 1 + (100 - 80) = 1 + 20 = 21 \)\( 70 - (43 - 3) = 70 - 40 = 30 \)Ответ: 59, 30, 21, 30.