Решим уравнения:
540 : x = 380 : 19
540 : x = 20
x = 540 : 20
x = 27
x ⋅ 6 = 18 000 + 24
x ⋅ 6 = 18 024
x = 18 024 : 6
x = 3004
Решим примеры:
500 – 180 : (90 : 45) + 30 = 500 – 180 : 2 + 30 = 500 – 90 + 30 = 410 + 30 = 440
(90 + 510 : 30) ⋅ (80 : 4 ⋅ 5) = (90 + 17) ⋅ (20 ⋅ 5) = 107 ⋅ 100 = 10700
Ответ: x = 27, x = 3004, 440, 10700