15x6=90
5x27=135
17x6=102
Пошаговое объяснение:
15x6 = (10x6) + (5x6) = 60+30 = 90
5x27 = (5x20) + (7x5) = 100+35 = 135
17x6 = (10x6) + (7x6) = 60+42 = 102
