Вычечлите :а)3/7*5/8;б)4/33*11/19;в)(-15/17)*1/4;г)(-3/22)*(-22/3).
А.15/56 б.4/57 в.-15/68 г.1
3/7 * 5/8= (3*5)/(7*8)=15/56 4/33 * 11/19=4/3 * 1/19=4/57 -15/17 * 1/4= -15/68 -3/22 * -22/3=1