Выполнить умножение: а) 5/18 * 19; б)40/7 * 14/3; в)1/7 * 2/5; г)2 14/15 * 6 6/11; д)7/19 * 19/21; !

1) 5/18 • 19 = 95/18 = 5 5/18
2) 40/7 • 14/3 = 80/3 = 26 2/3
3) 1/7 • 2/5 = 2/35
4) 2 14/15 • 6 6/11 = 44/15 • 72/11 = 288/15 = 19 3/15 = 19 1/5
5) 7/19 • 19/21 = 7/21 = 1/3