Перепишите, заполняя пропуски:
а) ... * (15 + 12) = 5 * 15 + 5 * 12;
б) 12 * (... + ...) = 12 * 7 + 12 * 8;
в) ... * (... + ...) = 14 * 15 + 14 * 29.
... * (15 + 12) = 5 * 15 + 5 * 12 = 5 * (15 + 12) = 5 * 15 + 5 * 12
12 * (... + ...) = 12 * 7 + 12 * 8 = 12 * (7 + 8) = 12 * 7 + 12 * 8
... * (... + ...) = 14 * 15 + 14 * 29 = 14 * (15 + 29) = 14 * 15 + 14 * 29