А) (250 + 25) × 4 = (250 × 4) + (25 × 4) = 1000 + 100 = 1100
б) 6 × (150 + 16) = (6 × 150) + (6 × 16) = 900 + 96 = 996
{В дальнейшем вторую часть решения опускаю)
в) 8 × 11 + 8 × 29 = 40 × 8 = 320
г) 36 × 184 + 36 × 816 = 1000 × 36 = 36000
а) (30 - 2) × 5 = 150 - 10 = 140
б) 7 × (60 - 2) = 420 - 14 = 406
в) 85 × 137 - 75 × 137 = 10 × 137 = 1370
г) 78 × 214 - 78 × 204 = 78 × 10 = 780