Реши уравнения и сделай проверку:
a : 37 = 4;
80 : b = 16;
c * 25 = 75.
a : 37 = 4
a = 4 * 37 = (30 + 7) * 4 = 30 * 4 + 7 * 4 = 120 + 28
a = 148
Проверка:
148 : 37 = 4
4 = 4
80 : b = 16
b = 80 : 16
b = 5
Проверка:
80 : 5 = 16
(50 + 30) : 5 = 16
50 : 5 + 30 : 5 = 16
10 + 6 = 16
16 = 16
c * 25 = 75
c = 75 : 25
c = 3
Проверка:
3 * 25 = 75
3 * (20 + 5) = 75
3 * 20 + 3 * 5 = 75
60 + 15 = 75
75 = 75